Probability And Statistics Quarter 1 Post Test
This test is to measure what you have learned so in the first quarter.
Questions and Answers
- 1.
As what type of variable would you classify height?
- A.
Quantitative
- B.
Categorical
- C.
None of the Above
Correct Answer
A. QuantitativeExplanation
Height is a numerical measurement that can be expressed in specific units, such as inches or centimeters. It can take on a range of values and can be compared and analyzed mathematically. Therefore, height is classified as a quantitative variable.Rate this question:
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- 2.
As what type of variable would you classify month of birth?
- A.
Quantitative
- B.
Categorical
- C.
None of the Above
Correct Answer
B. CategoricalExplanation
The month of birth is classified as a categorical variable because it represents distinct categories or groups. Categorical variables are used to classify data into groups or categories based on qualitative characteristics, such as names or labels. In this case, the month of birth does not have a numerical value and cannot be measured on a numerical scale. Instead, it represents different categories or groups based on the twelve months of the year. Therefore, it is appropriate to classify the month of birth as a categorical variable.Rate this question:
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- 3.
As what type of variable would you classify shirt size?
- A.
Quantitative
- B.
Categorical
- C.
None of the Above
Correct Answer
B. CategoricalExplanation
Shirt size is classified as a categorical variable because it represents different categories or labels rather than numerical values. It does not have a natural order or numerical meaning, but rather represents different sizes such as small, medium, large, etc. Categorical variables are used to classify or group data based on specific characteristics or attributes.Rate this question:
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- 4.
As what type of variable would you classify GPA?
- A.
Quantitative
- B.
Categorical
- C.
None of the Above
Correct Answer
B. CategoricalExplanation
GPA (Grade Point Average) is typically classified as a categorical variable because it represents a specific category or group. It is usually divided into categories such as "A," "B," "C," etc., rather than being measured on a continuous scale. Categorical variables are used to classify data into distinct groups or categories, making GPA a suitable example of this type of variable.Rate this question:
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- 5.
Categorize the following distribution:
- A.
Skewed Right
- B.
Skewed Left
- C.
Symmetric
- D.
Even
Correct Answer
B. Skewed LeftExplanation
The given answer, "Skewed Left," suggests that the distribution is asymmetrical and the tail of the distribution is longer on the left side. This means that there are more observations with lower values and fewer observations with higher values.Rate this question:
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- 6.
Categorize the following distribution:
- A.
Skewed Right
- B.
Skewed Left
- C.
Symmetric
- D.
Even
Correct Answer
A. Skewed RightExplanation
The given answer, "Skewed Right," suggests that the distribution is asymmetrical and the tail of the distribution extends towards the right side. This means that there are more extreme values on the right side of the distribution, while the majority of the data is concentrated towards the left side.Rate this question:
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- 7.
Categorize the following distribution:
- A.
Skewed Right
- B.
Skewed Left
- C.
Symmetric
- D.
Even
Correct Answer
C. SymmetricExplanation
The distribution is categorized as symmetric because it is evenly balanced around the mean. This means that the data is equally distributed on both sides of the mean, resulting in a bell-shaped curve when plotted on a graph.Rate this question:
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- 8.
Create a stemplot with the following date: 20, 28, 33, 23, 21, 18, 24, 20, 32, 16, 27, 21, 27, 22 to enter answer use stem then L then leaf seperated by commas i.e. 4L1,2,3
Correct Answer
1L6,8 2L0,0,1,1,2,3,4,7,7,8 3L2,3
1L 6, 8 2L 0, 0, 1, 1, 2, 3, 4, 7, 7, 8 3L 2, 3Explanation
The stemplot is a visual representation of the data values. The stems represent the tens digit of the data values, while the leaves represent the ones digit. The stemplot provided shows the stems (tens digits) in ascending order, followed by the leaves (ones digits) for each stem. For example, the stem "1L" represents the tens digit 1, and the leaves "6,8" represent the ones digits 6 and 8. The stemplot helps to organize and display the data in a concise and easy-to-read format.Rate this question:
- 9.
For the following, please find the mean, median and mode. 6, 4, 4, 3, 3, 2, 6, 5, 4, 7, 2, 17
- 10.
Find the mean for the number of points Points 4 5 6 7 Tally 10 8 12 5
- A.
5.5
- B.
8.75
- C.
5.3
- D.
7.125
Correct Answer
C. 5.3Explanation
The mean is calculated by summing up all the numbers and dividing by the total number of values. In this case, the sum of the points is 4+5+6+7 = 22. The total number of values is 4. Therefore, the mean is 22/4 = 5.5. However, none of the answer choices match this calculation. Therefore, it can be concluded that the question is incomplete or not readable, and an explanation cannot be generated.Rate this question:
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- 11.
With the data 6, 4, 4, 3, 3 find the following: a) range b) interquartile range c) standard deviation
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