# TACHS: Statistics & Data Analysis Chapter Exam

Choose your answers to the questions and click 'Next' to see the next set of questions. You can skip questions if you would like and come back to them later with the yellow "Go To First Skipped Question" button. When you have completed the practice exam, a green submit button will appear. Click it to see your results. Good luck!

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#### Question 1 1. During the first four Summer Olympic games attended by the United States, these medal counts were awarded. Calculate the mean number of medals won during these Olympic Games. (Round it to the nearest whole number.)

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Question 2
2.
Find the maximum in the data set:

27, 26, 33, 45, 38, 38, 58, 54, 19, 22, 31

#### Question 3 3. What are three methods you can use to find the spread in data?

#### Question 4 4. What is a ranking system in which the mathematical values that are equal are given equal rank and the next, lesser value is given the next highest rank?

#### Question 5 5. What is a single number that summarizes an entire data set?

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#### Question 6 6. What is a system of ordering where each mathematical value is given a certain position in a sequence of numbers, where no positions are equal?

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Question 7
7.
What is the range of the data set below?

3, 7, 9, 11, 11, 11, 15, 17, 18, 24

#### Question 8 8. A statistician makes a graph, which includes a shape that's almost mirrored perfectly across a line, but not quite. How should we describe the shape?

#### Question 9 9. What is the midpoint value of a data set, where the values are arranged in ascending or descending order?

#### Question 10 10. Which of these will become a weighted average?

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#### Question 11 11. Gender is an example of what type of variable?

#### Question 12 12. What is a system of ordering in which the mathematical values that are equal are given the mean of the ranking positions?

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Question 13
13.
Find the range for one standard deviation in the following data set:

101, 106, 125, 142, 78, and 109

#### Question 14 14. Sarah is a researcher that works for a development institute. She is interested in how the number of hours a student spends playing video games impacts their grades. The first thing Sarah does in her research is identify the variables. Why is this important?

#### Question 15 15. What is a measure that indicates what percent of the given population scored at or below the measure?

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#### Question 16 16. A sample is usually intended to be

#### Question 17 17. If you are collecting data on how many teddy bears are in certain toy stores, the number of teddy bears would best be described as what type of variable?

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Question 18
18.
Find the average of the following numbers.

2, 2, 2, 3, 3, 4, 5, 8

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Question 19
19.
Find the range for one standard deviation in the following data set:

16, 20, 14, 24, 16, 19, 30, and 8

#### Question 20 20. A graph that peaks to the left or the right of the center is known as _____.

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Question 21
21.
Find the first quartile for the following data set:

7, 9, 13, 4, 18, 3, 9, 10, 15, 8, 2, 6, 9

#### Question 22 22. During the first four Summer Olympic games attended by the United States, these medal counts were awarded. Calculate the mode number of medals won during these Olympic Games.

#### Question 23 23. Brown school has decided to review their ratio of girls to boys in the Second grade class. They decided to count the number of boys in Second grade. This is an example of what type of data?

#### Question 24 24. During the first four Summer Olympic games attended by the United States, these medal counts were awarded. Calculate the median number of medals won during these Olympic Games.

#### Question 25 25. What is a group of values and/or means that divide a data set into quarters, or groups of four?

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#### Question 26 26. What is the measure of how far the numbers in a data set are away from the mean or the median?

#### Question 27 27. What is the largest mathematical value in a data set?

#### Question 28 28. When a data set is visually symmetrical, what occurs all at the same point?

#### Question 29 29. Select the statement that represents discrete quantitative data.

#### Question 30 30. During the first four Summer Olympic games attended by the United States, these medal counts were awarded. Calculate the range number of medals won during these Olympic Games.

#### TACHS: Statistics & Data Analysis Chapter Exam Instructions

Choose your answers to the questions and click 'Next' to see the next set of questions. You can skip questions if you would like and come back to them later with the yellow "Go To First Skipped Question" button. When you have completed the practice exam, a green submit button will appear. Click it to see your results. Good luck!