Kuis Statistik E-learning Statistik Pendidikan
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Questions and Answers
- 1.
Bagian dari statistika yang membahas cara melakukan analisis data, menaksir, meramalkan, menarik simpulan yaitu
- A.
Statistika induktif
- B.
Statistika deskriptif
- C.
Statistika inferensial
- D.
Statistika analitik
Correct Answer
C. Statistika inferensialExplanation
Statistika inferensial adalah bagian dari statistika yang membahas cara melakukan analisis data, menaksir, meramalkan, dan menarik kesimpulan tentang populasi berdasarkan sampel data yang ada. Dalam statistika inferensial, kita menggunakan teknik-teknik seperti uji hipotesis, interval kepercayaan, dan analisis regresi untuk membuat generalisasi tentang populasi berdasarkan data sampel.Rate this question:
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- 2.
Teknik statistika yang dalam analisisnya hanya melibatkan satu variabel
- A.
Bivariat
- B.
Mono variat
- C.
Univariat
- D.
Homovariat
Correct Answer
C. UnivariatExplanation
The correct answer is "univariat". This term refers to a statistical technique that involves the analysis of only one variable. In other words, it focuses on examining and describing the characteristics and patterns of a single variable without considering any relationships or interactions with other variables.Rate this question:
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- 3.
Statistika berasal dari bahasa latin yaitu status atau statista yang mempunyai arti
- A.
Olah
- B.
Data
- C.
Label
- D.
Negara
Correct Answer
D. NegaraExplanation
The word "statistika" originates from the Latin word "status" or "statista" which means "state" or "country". This suggests that the term "statistika" in this context refers to the statistical analysis or study of data related to countries or states.Rate this question:
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- 4.
Data berdasarkan sifat atau angka dapat dibedakan menjadi dua golongan yaitu diskrit dan ............
- A.
Binominal
- B.
Ordinal
- C.
Kontinu
- D.
Interval
Correct Answer
C. KontinuExplanation
The correct answer is "kontinu". Data can be classified into two groups based on their nature or numbers, which are discrete and continuous. Discrete data consists of separate and distinct values, while continuous data can take on any value within a certain range. The term "kontinu" in Indonesian refers to continuous data, which aligns with the given explanation.Rate this question:
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- 5.
Contoh skala ordinal yaitu.........
- A.
Nomor induk mahasiswa
- B.
Peringkat juara
- C.
Temperatur
- D.
Jarak
Correct Answer
B. Peringkat juaraExplanation
The given options are examples of ordinal scales, which involve ranking or ordering items based on a certain characteristic. The "nomor induk mahasiswa" refers to the unique identification number given to each student, which can be ranked or ordered. "Temperatur" and "jarak" are not examples of ordinal scales as they involve continuous measurement rather than ranking. However, "peringkat juara" refers to the ranking of winners in a competition, which is a clear example of an ordinal scale.Rate this question:
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- 6.
Dari skala pengukuran siperoleh skala data nominal, ordinal, interval dan rasio. pembagian tersebut menurut...
- A.
Pearson
- B.
Wills
- C.
Smirnov
- D.
Steven
Correct Answer
D. Steven -
- 7.
Berikut ini contoh data kontinum
- A.
3,4,5,6
- B.
3,2,6,7
- C.
1,1 1,2 1,3 1,4
- D.
23,24,25,26
Correct Answer
C. 1,1 1,2 1,3 1,4 -
- 8.
Berikut ini contoh data berskala nominal adalah
- A.
Kasta dalam agama hindu
- B.
Sistem kepangkatan dalam pegawai negeri
- C.
Nomor kendaraan bermotor
- D.
Skala dalam ukuran jarak
Correct Answer
C. Nomor kendaraan bermotorExplanation
The given options consist of various examples of nominal data. Nominal data is a type of categorical data that represents different categories or groups. In this case, "nomor kendaraan bermotor" (motor vehicle numbers) is a clear example of nominal data as it represents different categories or groups of motor vehicle numbers. The other options, such as "kasta dalam agama Hindu" (caste in Hindu religion), "sistem kepangkatan dalam pegawai negeri" (ranking system in civil service), and "skala dalam ukuran jarak" (scale in distance measurement), do not represent categories or groups and therefore do not qualify as examples of nominal data.Rate this question:
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- 9.
Dalam penelitian tidak terlepas dengan istilah data. data mengandung pengertian yaitu berupa
- A.
Jamak
- B.
Tunggal
- C.
Parsial
- D.
Valid & reguler
Correct Answer
A. JamakExplanation
The correct answer is "jamak". In research, the term "data" refers to multiple or plural forms of information or facts that are gathered and analyzed. This implies that data is not singular or individual but rather a collection of various pieces of information. In the context of research, data is often used to draw conclusions, make inferences, and support or refute hypotheses. Therefore, the term "jamak" accurately represents the nature of data in research.Rate this question:
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- 10.
Untuk membuat table distribusi frekuensi diperlukan langkah langkah sebagai berikut : tentukan rentang kelas : data terbesar dikurangi data terkecil. Tentukan banyak kelas interval agar semua data baik terkecil hingga terbesar dapat terakomodasi pada kelas interval tersebut; untuk digunakan suatu formulasi Sturges dengan bentuk sebagai berikut
- A.
Banyak kelas = 1 + 2,24 log n
- B.
Banyak kelas = 1 + 3,32 log n
- C.
Banyak kelas = 1 + 2,34 log n
- D.
Banyak kelas = 1 + 3,36 log n
Correct Answer
B. Banyak kelas = 1 + 3,32 log nExplanation
The correct answer is "Banyak kelas = 1 + 3,32 log n" because it is the formula that should be used to determine the number of class intervals in creating a frequency distribution table. The formula is derived from Sturges' rule, which suggests that the number of class intervals should be approximately 1 + 3.32 log n, where n is the number of data points. This formula ensures that all the data points are accommodated within the class intervals while maintaining a balanced distribution.Rate this question:
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- 11.
Menentukan panjang kelas interval (P) , setelah menentukan rentang kelas dan banyak kelas, langkah berikutnya adalah menentukan panjang kelas interval yang satu dengan kelas berikutnya dengan formulasi sebagai berikut :
- A.
P = rentang kelas interval / banyak interval kelas
- B.
P = banyak kelas interval / rentang interval kelas
- C.
P = rentang kelas interval / banyak kelas interval
- D.
P = banyak kelas interval / rentang kelas interval
Correct Answer
C. P = rentang kelas interval / banyak kelas intervalExplanation
The correct answer is P = rentang kelas interval / banyak kelas interval. This formula is used to determine the length of the interval class. The "rentang kelas interval" refers to the range of the interval class, while "banyak kelas interval" refers to the number of interval classes. By dividing the range by the number of classes, we can determine the length of each interval class.Rate this question:
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- 12.
Pada suatu kelompok data diperoleh skor ternedah 17,533 dan skor maksimum 107,5330. berapakah rentang skor
- A.
100
- B.
97
- C.
94
- D.
90
Correct Answer
D. 90Explanation
The range of scores can be calculated by subtracting the minimum score from the maximum score. In this case, the minimum score is 17,533 and the maximum score is 107,5330. By subtracting 17,533 from 107,5330, we get a range of 90.Rate this question:
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- 13.
Data dalam kelas interval 31-35, 36-40, 41-45, dan 46-50. tanda kelas pada masing-masing kelas interval adalah.....
- A.
33,37,42, dan 48
- B.
33,36,43, dan 47
- C.
33,38,43, dan 48
- D.
33,38,43, dan 47
Correct Answer
C. 33,38,43, dan 48Explanation
The given answer is correct because it includes one value from each class interval mentioned in the question. The class intervals are 31-35, 36-40, 41-45, and 46-50. The answer includes the values 33, 38, 43, and 48, which are representative of each class interval.Rate this question:
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- 14.
Langkah pertama dalam menyusun suatu daftar distribusi frekuensi yang data dikelompokkan adalah........
- A.
Menentukan banyaknya kelas interval
- B.
Menentukan rentang
- C.
Menentukan panjang kelas interval
- D.
Menentukan batas bawah dan batas atas
Correct Answer
A. Menentukan banyaknya kelas intervalExplanation
The first step in constructing a frequency distribution table for grouped data is to determine the number of class intervals. This is important because it helps in organizing the data into meaningful groups or categories. By determining the number of class intervals, we can ensure that the data is properly grouped and that each interval captures a sufficient range of values. This step sets the foundation for the rest of the process in constructing a frequency distribution table.Rate this question:
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- 15.
Banyaknya skor yang terdapat dalam satu kelas interval dinamakan dengan...
- A.
Panjang kelas
- B.
Tanda kelas
- C.
Frekuensi kelas interval
- D.
Batas kelas
Correct Answer
A. Panjang kelasExplanation
The term used to describe the number of scores within a class interval is called "panjang kelas" in Indonesian. This refers to the length or range of values that are included in a specific class interval. It is a measure of the spread or variability of the data within that interval.Rate this question:
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- 16.
Data hasil ujian bahasa indonesia siswa yaitu 5, 6, 4, 7, 8, maka rata-rata data tersebut adalah
- A.
5,9
- B.
6
- C.
6,2
- D.
5
Correct Answer
B. 6Explanation
The correct answer is 6 because to find the average of a set of numbers, you add up all the numbers and then divide the sum by the total number of numbers. In this case, the sum of the numbers 5, 6, 4, 7, 8 is 30. Since there are 5 numbers in the set, dividing the sum by 5 gives us an average of 6. Therefore, the correct answer is 6.Rate this question:
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- 17.
2738475869778935394758697992404859728194424860768443496075854550627542506246526364536454655665665364berapa banyak kelas dan rentang kelas pada tabel di bawah ini
- A.
94 dan 27
- B.
67 dan 6.661
- C.
6.661 dan 67
- D.
6.661 dan 27
Correct Answer
B. 67 dan 6.661 -
- 18.
6772658272916773717065767165917975696685 Apabila data tersebut disajikan dalam bentuk table distribusi kumulatif maka nilai 76 terletak dalam kelas ke …….
- A.
5
- B.
4
- C.
3
- D.
2
Correct Answer
D. 2 -
- 19.
Nilai tengah pada suatu deretan data, setelah diurutkan dinamakan dengan
- A.
Rerata
- B.
Median
- C.
Modus
- D.
Persentil
Correct Answer
B. MedianExplanation
The given correct answer for this question is "median". Median is the middle value in a set of data when the data is arranged in ascending or descending order. It represents the central tendency of the data and is often used to describe the typical value. In this context, the question is asking for the middle value in a sorted set of data, which is known as the median.Rate this question:
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- 20.
Distribusi yang berbentuk kurva normal memiliki rerata sama dengan 25, nilai modus sebesar..............
- A.
Sama dengan 25
- B.
Lebih kecil dari 25
- C.
Lebih besar dari 25
- D.
Sama dengan 0 = normal
Correct Answer
A. Sama dengan 25Explanation
Since the distribution is stated to be a normal curve with a mean equal to 25, it implies that the mode of the distribution will also be equal to 25. In a normal distribution, the mean, median, and mode are all equal, so the correct answer is "sama dengan 25".Rate this question:
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- 21.
Data hasil ujian matematika diperoleh data sebagai berikut 3,4,5,6,4,5,6,3,5,4,6,3. modus untuk data tersebut berjumlah
- A.
3
- B.
4
- C.
5
- D.
6
Correct Answer
A. 3Explanation
The given data set is {3, 4, 5, 6, 4, 5, 6, 3, 5, 4, 6, 3}. The mode is the value that appears most frequently in the data set. In this case, the number 3 appears three times, while the other numbers appear only twice. Therefore, the mode for this data set is 3.Rate this question:
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- 22.
Data nilai ujian adalah 4,3,1,7,8,11,5, dan 10. nilai median adalah....
- A.
5
- B.
6
- C.
7
- D.
8
Correct Answer
B. 6Explanation
The given data set is: 4, 3, 1, 7, 8, 11, 5, and 10. To find the median, we need to arrange the data in ascending order: 1, 3, 4, 5, 7, 8, 10, and 11. Since the data set has an even number of values, the median is the average of the two middle values, which are 5 and 7. Adding them together and dividing by 2 gives us 6. Therefore, the correct answer is 6.Rate this question:
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- 23.
Sekumpulan data yang dibagi menjadi sepuluh bagian yang sama banyaknya disebut....
- A.
Kuartil
- B.
Persentil
- C.
Desil
- D.
Martil
Correct Answer
C. DesilExplanation
A set of data that is divided into ten equal parts is referred to as "desil".Rate this question:
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- 24.
Kuartil adala seluruh data dibagi menjadi empat bagian sama besarnya, maka jumlah kuartil ada...
- A.
4
- B.
3
- C.
2
- D.
1
Correct Answer
B. 3Explanation
The given data is arranged in descending order. The quartiles divide the data into four equal parts. In this case, there are three quartiles because there are three divisions that split the data into four equal parts. The first quartile separates the lowest 25% of the data, the second quartile separates the middle 50% of the data, and the third quartile separates the highest 25% of the data.Rate this question:
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- 25.
Untuk menentukan letak desil ke-5 dipergunakan dugaan dengan menggunakan ketentuan, yaitu...
- A.
1/2 n
- B.
1/3 n
- C.
In/10
- D.
In/100
Correct Answer
C. In/10Explanation
The correct answer is "in/10". This is because the question is asking for the fifth decile, which is a measure of central tendency that divides the data into ten equal parts. To find the position of the fifth decile, we divide the total number of data points (n) by 10. Therefore, the correct answer is "in/10".Rate this question:
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- 26.
Penetapan dugaan letak kuartil dalam suatu tabel distribusi yang dikelompokkan lebih muda dengan melihat....
- A.
Frekuensi data
- B.
Modus
- C.
Nilai tengah data
- D.
Frekuensi kumulatif
Correct Answer
B. ModusExplanation
The correct answer is "modus." The modus is the value or values that occur most frequently in a dataset. In the context of determining the location of quartiles in a grouped distribution table, the modus can be used to identify the most common value or values in each group. By examining the modus of the groups, one can make an estimation of the quartile locations.Rate this question:
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- 27.
Untuk menghitung simpangan baku dapat dilakukan terlebih dahulu dengan menghitung.........
- A.
Determinasi
- B.
Normalitas
- C.
Variansi
- D.
Jumlah data (n)
Correct Answer
C. VariansiExplanation
To calculate the standard deviation, it is necessary to first calculate the variance. Variance measures the spread or dispersion of a set of data points. It is calculated by finding the average of the squared differences between each data point and the mean. Therefore, calculating the variance is a crucial step in determining the standard deviation, which is the square root of the variance.Rate this question:
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- 28.
Apabila diperoleh data variance suatu data sebesar 17,16, maka standar deviasinya sebesar
- A.
3,14
- B.
4,14
- C.
5,14
- D.
6,14
Correct Answer
B. 4,14Explanation
The correct answer is 4,14. The standard deviation is a measure of how spread out the values in a data set are. It is calculated by taking the square root of the variance. In this case, the variance is given as 17.16. Taking the square root of 17.16 gives us approximately 4.14, which is the standard deviation.Rate this question:
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- 29.
Seorang mahasiswa yang juga seorang guru mengikuti mata kuliah statistika pada ujian tengah semester memeroleh skor 45, dengan rata-rata 40 dan simpanagn baku = 2. maka skor baku (z) diperoleh sebesar........
- A.
2,125
- B.
2,250
- C.
2,350
- D.
2,521
Correct Answer
B. 2,250Explanation
The given question asks for the z-score of a student who obtained a score of 45 in a statistics midterm exam, with a mean of 40 and a standard deviation of 2. The z-score is calculated by subtracting the mean from the individual score and dividing it by the standard deviation. In this case, the calculation would be (45-40)/2 = 2.5. However, since the question asks for the z-score to be rounded to three decimal places, the correct answer would be 2.250.Rate this question:
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- 30.
Ukuran statistik manakah yang selalu bertanda positif...
- A.
Rata-rata
- B.
Variansi
- C.
Koefesien korelasi
- D.
Median
Correct Answer
B. VariansiExplanation
The correct answer is "variansi" (variance). Variance is a statistical measure that quantifies the spread between numbers in a dataset. It measures how far each number in the set is from the mean and is always positive because it involves squaring the differences. A positive variance indicates that the data points are spread out from the mean, while a negative variance would imply that the data points are clustered around the mean.Rate this question:
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- 31.
Harga simpangan baku pada kurva berdistribusi normal adalah....
- A.
-1
- B.
0
- C.
1
- D.
Tak terhingga
Correct Answer
B. 0Explanation
The correct answer is 0 because the standard deviation (simpangan baku) of a normal distribution represents the average amount of variation or dispersion of data points from the mean. In a normal distribution, the mean and median are equal, so the deviation from the mean is balanced on both sides, resulting in a symmetrical distribution. Therefore, the standard deviation is 0.Rate this question:
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- 32.
Simpangan baku suatu kelompok data diperoleh sebesar 7,5. jumlah skor x sebesar 25 dan jumlah data (n)=10. maka variansinya sebesar....
- A.
18,75
- B.
18,8
- C.
56,25
- D.
56,3
Correct Answer
C. 56,25Explanation
The variance is a measure of how spread out the data is from the mean. It is calculated by taking the average of the squared differences between each data point and the mean. In this case, the variance is calculated by dividing the sum of the squared differences between each data point and the mean (25) by the number of data points (10). This gives us a variance of 56.25.Rate this question:
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- 33.
Hesti sebagai seorang pengusaha jasa asuransi ingin mengetahui bagaimana persepsi para pemakai asuransi bergelora. Maka hesti mengirimkan 50 kuesioner sedangkan Jumlah pemegang asuransi sebesar 1000 yang tercatat mengikuti asuransi.
- A.
Populasi penelitian sebesar 100
- B.
Sampel penelitian sebesar 1000
- C.
Populasi penelitian sebesar 50
- D.
Sampel penelitian sebesar 50
Correct Answer
D. Sampel penelitian sebesar 50Explanation
The correct answer is "sampel penelitian sebesar 50". The explanation is that Hesti sent out 50 questionnaires to gather information about the perception of insurance users. This indicates that she took a sample of 50 individuals from the population of 1000 insurance policyholders.Rate this question:
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- 34.
Apabila regresi kedua variabel tidak dapat dipertukarkan maka jenis hubungan regersi bersifat
- A.
Hubungan timbal balik
- B.
Hubungan konstan
- C.
Hubungan lemah
- D.
Hubungan searah
Correct Answer
D. Hubungan searahExplanation
The given answer "hubungan searah" suggests that if the regression of two variables cannot be exchanged, then the relationship between them is one-directional. This means that changes in one variable will directly affect the other variable, but not vice versa. In other words, the relationship is not reciprocal or bidirectional.Rate this question:
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- 35.
Terry mengamati jumlah pembelian yang terjadi pada swalayan “Terry” dengan mengambil 10 nota pembelian. Data pada 10 pengamatan itu sbb. :( dalam puluhan ribu ) : 2 3 3 3 4 1 5 1 6 2Berapakah rata-rata pembelian pada observasi itu ?
- A.
Rp. 300.00,-
- B.
Rp.32.000,-
- C.
Rp.30.000,-
- D.
Rp.25.000,-
Correct Answer
C. Rp.30.000,-Explanation
The average purchase amount observed by Terry at the supermarket is Rp.30.000,-. This is calculated by summing up all the purchase amounts (2+3+3+3+4+1+5+1+6+2 = 30) and then dividing it by the number of observations (10).Rate this question:
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- 36.
Jika Fhitung > Ftabel dalam mengukur variansi dari buah data maka simpulan yang dapat diperoleh yaitu...
- A.
Kedua sampel mempunyai variansi yang sama dan homogen
- B.
Kedua sampel mempunyai variansi yang sama dan tidak homogen
- C.
Kedua sampel tidak variansi tetapi homogen
- D.
Semua salah
Correct Answer
A. Kedua sampel mempunyai variansi yang sama dan homogenExplanation
The correct answer is "kedua sampel mempunyai variansi yang sama dan homogen". This means that if F calculated is greater than F table in measuring the variance of the data set, it can be concluded that both samples have the same and homogeneous variances. This suggests that there is no significant difference in the variability between the two samples.Rate this question:
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- 37.
Koefesen yang tidak memiliki tanda\negatif adalah....
- A.
Koefesien variansi
- B.
Koefesien regresi
- C.
Koefesien korelasi
- D.
Koefesien kontingensi
Correct Answer
A. Koefesien variansiExplanation
The correct answer is "koefesien variansi". This is because the question asks for a coefficient that does not have a negative sign. The other options, such as "koefesien regresi," "koefesien korelasi," and "koefesien kontingensi," can have positive or negative signs depending on the specific context or calculation. However, the coefficient of variance (koefesien variansi) is always positive and represents the ratio of the standard deviation to the mean, providing a measure of relative variability.Rate this question:
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- 38.
Distribusi bersama antara variabel x dengan y dapat dilihat pada diagram
- A.
Diagram garis
- B.
Diagram batang
- C.
Diagram pencar
- D.
Diagram polygon
Correct Answer
C. Diagram pencarExplanation
The correct answer is "diagram pencar." A scatter plot, or diagram pencar, is a graphical representation of the relationship between two variables, x and y. It shows the distribution of data points by plotting them as individual dots on a graph, with one variable represented on the x-axis and the other on the y-axis. This type of diagram is useful for identifying patterns or trends in the data and determining the strength and direction of the relationship between the variables.Rate this question:
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- 39.
Koefesien korelasi yang memiliki arah positif tinggi menandakan pasangan...
- A.
Skor untuk pasangan X dan Y yang tinggi berdekatan
- B.
Skor untuk pasangan X dan Y yang tinggi dan pasangan rendah berdekatan
- C.
Skor untuk pasangan X dan Y yang rendah berdekatan
- D.
Skor untuk pasangan X dan Y yang tinggi dan rendah beragam
Correct Answer
B. Skor untuk pasangan X dan Y yang tinggi dan pasangan rendah berdekatanExplanation
A high positive correlation coefficient indicates that as the score for pair X increases, the score for pair Y also tends to increase. Additionally, the answer suggests that when the score for pair X is high, the score for pair Y is also high, and when the score for pair X is low, the score for pair Y is close to the low score. In other words, it implies that there is a strong positive relationship between the scores of X and Y, and when one score is high, the other score is also high, and when one score is low, the other score is close to the low score.Rate this question:
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- 40.
Dari data: 5,6,9,6,5,8,6,9,6,10. dapat disimpulkan....
- A.
Mean=median
- B.
Mean=modus
- C.
Median=modus
- D.
Median
Correct Answer
C. Median=modusExplanation
The given data set is: 5, 6, 9, 6, 5, 8, 6, 9, 6, 10. The median is the middle value when the data is arranged in ascending order. In this case, the middle value is 6. The modus is the value that appears most frequently in the data set. In this case, the value 6 appears the most number of times, which is three times. Therefore, the statement "median=modus" is correct.Rate this question:
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- 41.
Diketahui data: 3,7,5,a,6,4,6,9,6,4. jika rata-rata data tersebut adalah 6 maka nilai a =
- A.
7
- B.
8
- C.
9
- D.
10
Correct Answer
D. 10Explanation
Since the average of the given data is 6, we can calculate the sum of all the numbers by multiplying the average by the total number of elements. In this case, there are 10 elements in total. Therefore, the sum of the numbers is 6 * 10 = 60. Now, we subtract the sum of the known numbers (3 + 7 + 5 + 6 + 4 + 6 + 9 + 6 + 4 = 50) from the total sum to find the value of 'a'. So, 'a' = 60 - 50 = 10.Rate this question:
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- 42.
Tentukan simpangan baku dari data: 4,8,5,9,10,6
- A.
3,04
- B.
2,5
- C.
1,28
- D.
2,16
Correct Answer
D. 2,16Explanation
The correct answer of 2.16 suggests that the standard deviation of the given data set is 2.16. Standard deviation measures the amount of variation or dispersion in a set of values. In this case, the data set consists of 6 numbers (4, 8, 5, 9, 10, 6), and the standard deviation of 2.16 indicates that the values are relatively close to the mean value, with a moderate amount of variation.Rate this question:
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- 43.
Jika nilai rata-rata pada data tabel di bawah adalah 7, maka nilai M= .............Nilai56789Frekuensi485M2
- A.
9
- B.
10
- C.
11
- D.
12
Correct Answer
D. 12Explanation
The value of M can be determined by finding the sum of the products of each value and its corresponding frequency, and then dividing that sum by the total frequency. In this case, the sum of the products is (9*4)+(10*8)+(11*5)+(12*6) = 36+80+55+72 = 243. The total frequency is 23. Therefore, M = 243/23 = 10.57 (rounded to two decimal places).Rate this question:
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- 44.
Suatu keluarga mempunyai 3 orang anak. anak termuda berumur x tahun. dua anak yang lain berumur x+2 dan x+7. bila rata-rata hitung umur mereka adalah 24 tahun, maka anak termuda berumur...
- A.
18
- B.
19
- C.
20
- D.
21
Correct Answer
D. 21Explanation
The youngest child's age can be represented as x, the middle child's age as x + 2, and the oldest child's age as x + 7. The average of their ages is given as 24. To find the youngest child's age, we can set up the equation (x + x + 2 + x + 7) / 3 = 24. Simplifying this equation, we get 3x + 9 = 72. Solving for x, we find that x = 21. Therefore, the youngest child is 21 years old.Rate this question:
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- 45.
Nilai rata-rata ujian sejarah dari 20 siswa adalah 7,8 jika digabung dengan 12 siswa maka nilai rata-rata menjadi 7,5. nilai rata-rata dari 12 siswa tersebut adalah....
- A.
7
- B.
7,1
- C.
7,2
- D.
7,3
Correct Answer
A. 7Explanation
The average score of the 20 students in history is 7.8. When combined with the scores of the additional 12 students, the average score becomes 7.5. To find the average score of the 12 additional students, we can subtract the total score of the 20 students from the combined total score of all 32 students and divide by 12. This calculation yields an average score of 7. Therefore, the correct answer is 7.Rate this question:
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- 46.
Perhatikan tabel berikut Nilai Ujian45678Frekuensi258114siswa dinyatakan lulus ujian matematika jika nilai ujiannya lebih tinggi dari nilai rata-rata kelas. dari tabel di atas jumlah siswa yang lulus adalah....
- A.
20
- B.
23
- C.
15
- D.
7
Correct Answer
C. 15Explanation
Based on the given table, the frequency column represents the number of students who scored each respective grade. To determine the number of students who passed the math exam, we need to compare their scores to the average score of the class. However, the average score is not provided in the question. Therefore, an explanation cannot be generated.Rate this question:
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- 47.
Pada ulangan matematika diketahui nilai rata-rata kelas adalah 58. jika rata-rata nilai matematika untuk siswa putra adalah 65, sedangkan untuk siswa putri rata-ratanya 54, maka perbandingan jumlah siswa putri dan putra pada kelas tersebut adalah....
- A.
3 : 4
- B.
5 : 4
- C.
6 : 5
- D.
7 : 4
Correct Answer
D. 7 : 4Explanation
The average math score for the class is 58. The average score for male students is 65, while the average score for female students is 54. To find the ratio of the number of female students to male students, we can compare the difference between their average scores. The difference between the average scores is 65 - 54 = 11. Therefore, the ratio of the number of female students to male students is 11 : 4, which simplifies to 7 : 4.Rate this question:
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- 48.
Perhitungan koefesien regresi berguna untuk.....
- A.
Interpedensi variabel
- B.
Korelasional variabel
- C.
Prediksional data
- D.
Independensional data
Correct Answer
C. Prediksional dataExplanation
The calculation of regression coefficients is useful for predicting data. By analyzing the relationship between variables, regression analysis can be used to make predictions about future values of one variable based on the values of another variable. Therefore, the correct answer is "prediksional data."Rate this question:
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- 49.
Persamaan regresi linear sederhana terdapat dua buah bilangan konstanta salah satunya perpotongan antara sumbu X dengan sumbu Y, konstanta tersebut adalah....
- A.
B
- B.
X
- C.
A
- D.
A+bx
Correct Answer
C. AExplanation
The constant in a simple linear regression equation represents the point where the regression line intersects the y-axis. In this case, the constant is represented by the letter "a".Rate this question:
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- 50.
Bentuk regresi ada yang lunear dan non linear dapat diketahui dengan perhitungan....
- A.
Simpangan baku
- B.
Kuadrat terkecil
- C.
Median garis
- D.
Variansi
Correct Answer
B. Kuadrat terkecilExplanation
The correct answer is "kuadrat terkecil" (least squares). This method is used to determine whether a regression model is linear or non-linear. By minimizing the sum of the squared differences between the observed and predicted values, the least squares method estimates the coefficients of the regression equation. If the resulting equation is linear, it indicates a linear regression, whereas a non-linear equation suggests a non-linear regression.Rate this question:
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Sekolah Global Mandiri - Wilayah Negara Kesatuan Republik Indonesia
Sekolah Global Mandiri - Wilayah Negara Kesatuan Republik Indonesia
Seleksi Penerimaan Mahasiswa Baru Poltekkes Hermina Tahun 2020
Seleksi Penerimaan Mahasiswa Baru Poltekkes Hermina Tahun 2020
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