# Use the following to answer the exam scores out of

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Use the following to answer Questions 1216. The exam scores (out of 100 points) for all students taking an introductory Statistics course are used to construct the following boxplot. Question 12 (0.5 pts) Based on this boxplot, the interquartile range is closest to a. 10. b. 25. c. 50. d. 80.
5 Question 13 (0.5 pts) Based on this boxplot, which of the following statements is true?
Question 14 (0.5 pts) If each person increased his or her score by 5 points then
Question 15 (0.5 pts) About 25% of the student scores exceeded
Question 16 (0.5 pts) If 5 points were added to each score, then standard deviation of the new scores would a. be increased by 5. b. be increased by 25. c. be decreased by 5. d. remain unchanged.
Question 17 (0.5 pts) Which of the following sets of four numbers has the greatest standard deviation?
Question 18 (0.5 pts) A Normal density curve has which of the following properties?
6 Question 19 (0.5 pts) At a large high school, students took a series of advanced tests. Each test covered a different subject area, had a different number of items, and a different mean and standard deviation. One of the students, Marquita, wants to see on which tests she performed the best. Which of the following methods should she use?
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