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# Statistics: Principles & Techniques 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!

### Page 1

#### Question 1 1. Using the box plot provided, what is the vertical line circled in red?

#### Question 2 2. Why might we represent a data set with a box plot?

#### Question 3 3. What do we call a value that is much smaller or larger than the other values in a data set?

#### Question 4 4. What is the sum of the numbers in a data set divided by the total number of values in the data set?

#### Question 5 5. 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.

### Page 2

#### Question 6 6. 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 7 7. When a data set is visually symmetrical, what occurs all at the same point?

#### Question 8 8. A graph that peaks to the left or the right of the center is known as _____.

#### Question 9 9. A chart that shows the popularity or mode of a certain type of data is what?

#### Question 10 10. What is a chart that shows the popularity or mode of a certain type of data based on the population sampled?

### Page 3

#### Question 11 11. A student makes a dot plot to represent the grades their classmates got on the last test, and finds that it makes a shape that is mirrored nearly perfectly across a line at the mean. Is this shape symmetrical? Why or why not?

#### Question 12 12. What is the shape of a graph that peaks to the left or the right of the center?

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Question 13
13.
What is the variance of the data set below?

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

#### Question 14 14. What is the difference between the upper quartile value and the lower quartile value?

#### Question 15 15. Analyze the following statements and indicate which one best describes the difference between the population and the sample.

### Page 4

#### Question 16 16. Why might a researcher use a sample rather than an entire population for their study?

#### Question 17 17. In a survey, people on average responded that they floss seven times a week despite the fact that the actual averages are drastically lower. Which form of bias likely accounts for this discrepancy?

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Question 18
18.
*Experts indicate violent video games are a risk factor for aggressive behavior. Do you think it is important for young people to limit their time playing violent video games?* This is an example of which type of question?

#### Question 19 19. The bar graph shows the top five grossing movies from 2015. About how much money did Inside Out gross?

#### Question 20 20. Refer to the pie chart showing top fast food chains by 2015 sales. How many sectors does the chart contain?

### Page 5

#### Question 21 21. If there are two modes, you should _____.

#### Question 22 22. Which of the following is least likely to be reported?

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Question 23
23.
Find the standard deviation for the following data set:

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

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Question 24
24.
Find the standard deviation for the following data set:

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

#### Question 25 25. What can we show using a histogram?

### Page 6

#### Question 26 26. What is a graphical representation of the distribution of data?

#### Question 27 27. Which of the following is a type of random sampling?

#### Question 28 28. What are a sequence of equally distributed variables?

#### Question 29 29. What is a visual representation of data where numbers on the left side of a chart show one part of each value, while numbers on the right side of the chart show the other?

#### Question 30 30. Using the stem-and-leaf display below, select the correct data set that corresponds to the display.

#### Statistics: Principles & Techniques 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!