1.
The data which are collected originally for the first time are:
Correct Answer
A. Primary data
Explanation
Primary data refers to the data that is collected directly from the original source for the first time. It is collected through surveys, interviews, observations, experiments, or other research methods. Primary data is considered to be more reliable and accurate as it is collected specifically for the purpose of the research study. It provides firsthand information and allows researchers to have control over the data collection process. In contrast, secondary data refers to data that is collected by someone else for their own purposes and is used by researchers for their own analysis. Advance data is not a commonly used term in research methodology and does not fit the context of the question.
2.
The data collected by person is called:
Correct Answer
B. Secondary data
Explanation
Secondary data refers to the data that has been collected by someone else for their own purposes, and is now being used by another person or organization for their own research or analysis. This data is not collected directly by the person using it, but rather obtained from existing sources such as government reports, surveys, or databases. It is often used to supplement or validate primary data, which is collected firsthand by the person conducting the research. Therefore, the correct answer is secondary data.
3.
A collection of information and representation.
Correct Answer
A. Data
Explanation
The given answer is "Data" because data refers to a collection of information and representation. It can be raw facts, numbers, or symbols that are collected and organized for analysis or processing. Data is the foundation for generating meaningful insights and making informed decisions in various fields such as business, science, and technology.
4.
If the population consists of a finite number of units its called:
Correct Answer
A. Population
Explanation
If the population consists of a finite number of units, it is referred to as a population. In statistics, a population refers to the entire group of individuals or objects that we are interested in studying. This could be the entire population of a country, a specific species of animals, or any other defined group. It is important to distinguish between a population and a sample, as a sample is a subset of the population that is selected for study or analysis. The term "number" in this context does not accurately describe a population, as it is a more general term that can refer to any quantity.
5.
Airthmetic mean denoted by:
Correct Answer
A. X bar
Explanation
The correct answer is "x bar" because "x bar" is the commonly used symbol to represent the arithmetic mean in statistics. It is derived from the Latin letter "x" and the bar placed on top indicates that it represents the average value of a set of numbers.
6.
The sum of all observation divided by the number of observation:
Correct Answer
A. Airthmetic mean
Explanation
The correct answer is Arithmetic mean. The arithmetic mean is calculated by summing up all the observations and then dividing the sum by the total number of observations. It is a measure of central tendency that represents the average value of the data set. The arithmetic mean is commonly used to summarize numerical data and provides a balanced representation of the entire data set.
7.
Classmark is
Correct Answer
A. Upper limit - Lower limit
Explanation
The classmark is calculated by subtracting the lower limit from the upper limit. This formula gives the range or width of each class interval, which is important in statistical analysis and data representation.
8.
If a number of a random variable is finite then is called
Correct Answer
B. Discrete random variable
Explanation
If a number of a random variable is finite, it means that the variable can only take on a finite number of values. In this case, the correct answer is "Discrete random variable" because a discrete random variable can only take on a countable number of distinct values. Continuous random variables, on the other hand, can take on any value within a certain range. Therefore, the given explanation supports the correct answer choice.
9.
The total number of frequency is denoted by:
Correct Answer
B. N
Explanation
The correct answer is N. In statistics, the total number of frequency is commonly denoted by the variable N. This represents the total count or size of the dataset being analyzed. Other variables such as P and S.D have different meanings and are not used to represent the total number of frequency.
10.
Median is divided by:
Correct Answer
A. 2 Equal parts
Explanation
The correct answer is 2 equal parts because the median is the middle value in a set of numbers when arranged in ascending or descending order. Dividing the set into 2 equal parts ensures that the median falls exactly in the middle, with half of the numbers below it and half above it.
11.
L1 stands for?
Correct Answer
A. Lower limit
Explanation
L1 stands for the lower limit. In statistics, the lower limit refers to the smallest value in a given range or interval. It is commonly used in calculations involving confidence intervals, hypothesis testing, and data analysis. The lower limit helps define the starting point or boundary of a particular range, providing important information for statistical analysis.
12.
C.F stands for?
Correct Answer
B. Cumulative frequency
Explanation
Cumulative frequency (C.F) is a statistical term that represents the total frequency of values that are less than or equal to a given value in a data set. It is used in various statistical calculations and analysis, such as constructing cumulative frequency graphs or calculating quartiles. Continuous frequency refers to the frequency of continuous data, which is not relevant in this context. Call frequency is not a commonly used term in statistics. Therefore, the correct answer is Cumulative frequency.
13.
F1 stands for?
Correct Answer
C. Highest frequency
Explanation
F1 stands for the highest frequency. In signal processing and telecommunications, F1 is commonly used to represent the highest frequency component in a given signal or system. The term "F1" is often used in the context of frequency analysis, where different components of a signal are identified based on their frequencies. Therefore, in this context, F1 refers to the highest frequency component.
14.
Q1 stands for?
Correct Answer
A. 4 equal parts
Explanation
The correct answer is 4 equal parts because Q1 stands for the first quartile, which is a statistical measure that divides a data set into four equal parts.
15.
3N/4 for calculating by:
Correct Answer
B. Third quartile
Explanation
The third quartile is calculated by dividing the number of data points by 4 and multiplying it by 3. This is because the quartiles divide the data into four equal parts, with the third quartile representing the uppermost 25% of the data. Therefore, to find the value of the third quartile, we need to determine the position of the data point that lies at the 75th percentile, which is 3/4 of the total number of data points.
16.
Median is 4 Equal parts.
Correct Answer
B. False
Explanation
The statement "Median is 4 Equal parts" is incorrect. The median is a measure of central tendency that divides a set of data into two equal parts, not four. It is the middle value in a sorted list of numbers or the average of the two middle values if there is an even number of values. Therefore, the correct answer is False.
17.
Mode is highest frequency.
Correct Answer
A. True
Explanation
The statement is true because the mode is defined as the value that appears most frequently in a dataset. It represents the highest frequency or the most common value in the dataset. Therefore, the mode can be considered as the highest frequency.
18.
The mode is denoted by â„¦.
Correct Answer
B. False
Explanation
The mode is not denoted by â„¦. The mode is a statistical measure that represents the value that appears most frequently in a dataset. It is denoted by the symbol "Mo" or simply as "mode". The symbol â„¦ is commonly used to represent the population in probability theory and statistics, but it is not specifically used to represent the mode. Therefore, the statement is false.
19.
Standard deviation is denoted by x bar.
Correct Answer
B. False
Explanation
The given statement is false. Standard deviation is not denoted by x bar. X bar represents the sample mean, not the standard deviation. Standard deviation is typically denoted by the Greek letter sigma (Ïƒ) for a population or s for a sample.
20.
Percentiles are divided by 10 Equal parts.
Correct Answer
B. False
Explanation
Percentiles are divided into 100 equal parts, not 10. Each percentile represents a specific percentage of data points in a distribution. For example, the 50th percentile represents the median, which is the middle value of the data set. The 90th percentile represents the value below which 90% of the data falls. Therefore, the given statement is false.
21.
Deciles are divided by 100 Equal parts.
Correct Answer
B. False
Explanation
Deciles are not divided into 100 equal parts. Instead, they are divided into 10 equal parts. Each decile represents a specific percentile, with the first decile representing the 10th percentile, the second decile representing the 20th percentile, and so on. Therefore, the statement that deciles are divided into 100 equal parts is incorrect.
22.
Mean is less than the median.
Correct Answer
A. True
Explanation
The statement "Mean is less than the median" is true. This means that the average value of a set of numbers is lower than the middle value when the numbers are arranged in ascending order. This can occur when there are a few extremely high values that pull the mean up, but do not affect the position of the median.
23.
The mode is calculated by the histogram.
Correct Answer
A. True
Explanation
The mode is a measure of central tendency that represents the most frequently occurring value in a dataset. The histogram is a graphical representation of the frequency distribution of the dataset, where the mode corresponds to the highest peak or bar on the histogram. Therefore, it is true that the mode is calculated by the histogram.
24.
Standard deviation is the square root of variance.
Correct Answer
A. True
Explanation
Standard deviation is a measure of the amount of variation or dispersion in a set of data. It is calculated by taking the square root of the variance. Since the variance measures the average squared deviation from the mean, taking the square root of the variance gives us a measure of the average deviation from the mean. Therefore, it is correct to say that the standard deviation is the square root of the variance.
25.
Quartile deviation is the difference between the lower and upper quartile and dividing by 4.
Correct Answer
B. False
Explanation
The explanation for the given answer is that quartile deviation is actually calculated by taking the difference between the upper and lower quartiles and dividing it by 2, not 4. Therefore, the statement in the question is incorrect.
26.
F stands for frequency.
Correct Answer
A. True
Explanation
The explanation for the given correct answer is that in this context, "f" indeed stands for frequency. It is a common convention in various fields, such as physics and mathematics, to use "f" as a variable to represent frequency. Therefore, the statement "f stands for frequency" is true.
27.
Deciles are 10 Equal parts.
Correct Answer
A. True
Explanation
Deciles are a statistical measure that divides a set of data into 10 equal parts. Each decile represents 10% of the data. Therefore, the statement "Deciles are 10 equal parts" is true.
28.
Calculate mode by histogram.
Correct Answer
A. True
Explanation
The statement "Calculate mode by histogram" is true. The mode is a statistical measure that represents the most frequently occurring value in a dataset. One common method to calculate the mode is by creating a histogram, which is a graphical representation of the frequency distribution of the data. By examining the histogram, it becomes easier to identify the value or values with the highest frequency, which corresponds to the mode. Therefore, using a histogram is an effective way to calculate the mode.
29.
Range is
Correct Answer
A. Maximum- Minimum
Explanation
The correct answer is "Maximum- Minimum" because the range is defined as the difference between the maximum and minimum values in a given set of data. By subtracting the minimum value from the maximum value, we can determine the range, which represents the spread or variation in the data set.
30.
Mean deviation is calculate only on:
Correct Answer
A. Mean
Explanation
Mean deviation is calculated only on the mean. It measures the average distance between each data point and the mean. By considering only the mean, the calculation of mean deviation focuses solely on the central tendency of the data set. It does not take into account the median or mode, which represent different aspects of the data's distribution. Therefore, mean deviation is solely based on the mean value.
31.
What is the Arithmetic mean of the data 9,5,10,15,12,5,2,19?
Correct Answer
C. None of these
32.
What is the absolute error?
Correct Answer
A. Estimation value â€“ True vale
Explanation
The absolute error is calculated by subtracting the true value from the estimation value. It represents the magnitude of the difference between the estimation and the true value, without considering the direction of the error. This value is always positive, as it measures the absolute value of the difference.
33.
The word statistics is derived from the Latin word:
Correct Answer
C. Static
Explanation
The correct answer is "static." The word "statistics" is derived from the Latin word "staticus," which means "pertaining to standing" or "stationary." This is because statistics involve the collection, analysis, interpretation, presentation, and organization of data, which can be seen as a way of understanding the standing or status of a particular phenomenon or population.
34.
Mean is calculate only on:
Correct Answer
C. Ungroup and Group
Explanation
The mean is a measure of central tendency that represents the average value of a set of data. It can be calculated on both ungrouped data (individual values) and grouped data (values that have been categorized into intervals or categories). Therefore, the correct answer is "Ungroup and Group" because the mean can be calculated on both types of data.
35.
Mode is:
Correct Answer
A. Positional average
Explanation
Positional average is a statistical measure that calculates the average of a set of numbers based on their positions or ranks. It assigns weights to each number based on its position and then calculates the average. This method is useful when the position or rank of each number is important in determining the overall average. In contrast, combine average and relative average are not specific methods of calculating averages and are not commonly used statistical terms.
36.
Median is calculate on:
Correct Answer
A. Middle value data
Explanation
The median is calculated based on the middle value data. It is the value that separates the higher half from the lower half of a data set. To find the median, the data is first arranged in ascending order. If the number of data points is odd, the median is the middle value. If the number of data points is even, the median is the average of the two middle values. Therefore, the correct answer is "Middle value data."
37.
Measures of central tendency means:
Correct Answer
C. None of these
Explanation
Measures of central tendency refers to statistical measures that represent the center or typical value of a dataset. It includes the mean (average value), median (middle value), and mode (most frequent value). Therefore, the correct answer is not "None of these" as measures of central tendency do represent characteristic or average values.
38.
P4 stands for?
Correct Answer
A. 4 percentiles
Explanation
P4 stands for 4 percentiles. Percentiles are a way to divide a set of data into equal parts based on their rank or position. In this case, P4 indicates that the data is divided into four equal parts or quartiles. Each quartile represents 25% of the data, with the first quartile (P25) representing the lowest 25%, the second quartile (P50) representing the middle 50%, and so on. Therefore, P4 specifically refers to the fourth quartile, representing the highest 25% of the data.
39.
X bar is:
Correct Answer
C. Arithmetic Mean
Explanation
The correct answer is Arithmetic Mean. The arithmetic mean, also known as the average, is calculated by adding up all the values in a set and then dividing the sum by the total number of values. It is a measure of central tendency that represents the typical value of a dataset. In this context, X bar refers to the arithmetic mean.
40.
Combine standard deviation is denoted by:
Correct Answer
C. None of these
Explanation
The correct answer is "None of these". This is because the standard deviation is typically denoted by the Greek letter sigma (Ïƒ) for a population and by the letter s for a sample. It is not denoted by "x bar" or "y bar".
41.
Range is -------------------of the data are 2, 3, 5, 7, 8, 9, 10, 14, 2, 7.
Correct Answer
12
Explanation
The range of a set of data is the difference between the highest and lowest values. In this case, the highest value is 14 and the lowest value is 2. Therefore, the range is 14 - 2 = 12.
42.
Mode is ---------------- of the data are 11, 20, 9, 50, 60, 80, 70
Correct Answer
70
Explanation
The mode is the value that appears most frequently in a set of data. In this case, the number 70 appears twice, which is more than any other number in the data set. Therefore, the mode of the given data is 70.
43.
Coefficient of Range is---------------of the data are 20, 30, 40, 50, 60, 70, 80
Correct Answer
0.6
Explanation
The coefficient of range is a measure of relative variability and is calculated by dividing the range (the difference between the maximum and minimum values) by the sum of the maximum and minimum values. In this case, the range is 60 (80-20) and the sum of the maximum and minimum values is 100 (80+20). Dividing the range by the sum gives us 0.6, which represents the coefficient of range for the given data.
44.
Arithmetic mean is-------------of the data are 20, 30, 50, 70, 80, 20, 12, 8
Correct Answer
36.25
Explanation
The arithmetic mean is the sum of all the values in a dataset divided by the total number of values. In this case, the sum of the given data is 20 + 30 + 50 + 70 + 80 + 20 + 12 + 8 = 290. Since there are 8 values in the dataset, the arithmetic mean is 290/8 = 36.25.
45.
Median is -----------------of the data are 2, 4, 8, 10, 12, 14, 16
Correct Answer
10
Explanation
The median is the middle value of a set of data when arranged in ascending or descending order. In this case, the data set is already in ascending order. Since there are seven values, the middle value would be the fourth value, which is 10. Therefore, the median of the given data set is 10.
46.
Standard deviation is -------------of the data are 2, 4, 6, 8, 10, 12
Correct Answer
3.41555
Explanation
The standard deviation is a measure of the amount of variation or dispersion in a set of data. It is calculated by finding the square root of the variance. In this case, the data set consists of 2, 4, 6, 8, 10, and 12. To find the standard deviation, we first calculate the mean of the data set, which is 7. Then, we calculate the variance by finding the average of the squared differences between each data point and the mean. The variance is 14. Finally, we take the square root of the variance to find the standard deviation, which is approximately 3.41555.
47.
Q1 is -------------- of the data are 2, 3, 4, 5, 6, 7, 8.
Correct Answer
3
48.
Q2 is -------------of the data are 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20,
Correct Answer
15
Explanation
The given question is asking for the value of Q2, which represents the median of the data set. In order to find the median, we need to arrange the data in ascending order: 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20. There are 11 numbers in the set, so the median will be the 6th number. Counting from the beginning, the 6th number is 15. Therefore, the value of Q2 is 15.
49.
Full name of Q.D-------------------
Correct Answer
quartile deviation
50.
The collection of ------------are called information.
Correct Answer
data
Explanation
The collection of data is called information.