15. Given the data set 3, 6, 2, 9, 1, 0, compute (x + 1)2. A. 137 B. 25 C. 625 D. 175

16. Which of the following involves inferential statistics as opposed to descriptive statistics?

A. The Alcohol, Tobacco and Firearms department reported that Houston had 1,791 registered gun dealers in 1997.

B. A class of 50 statistics students earned an average grade of 73.5.

C. A local cable system, using a sample of 500 subscribers, estimates that 40 percent of its subscribers watch a premium channel at least once per day.

D. The city business office reported 35 building permits for new single-family housing units.

17. If a great many data values cluster to the left of a data distribution, which then tails off to the right, the distribution is referred to as

A. normal.

B. leftward skewed.

C. rightward skewed.

D. uniform.

18. When a sample is taken from a larger population, this suggests that which of the following will be used?

A. Computation of a sample mean

B. Inferential statistics

C. Independent events

D. Descriptive statistics

19. To answer the question, refer to the following data. Ten students were sampled at random from a student population. Each was asked how many courses he or she was planning on studying in the upcoming year. The following is a list of the reported data values: 1, 2, 2, 3, 4, 5, 5, 5, 5, 6 What is the standard deviation for the data values?

A. 2.56

B. 1.44

C. 2.84

D. 1.687

20. Several ways to make a bar graph deceptive appear below. Which of these is sometimes used to exaggerate differences from one data value to the next?

A. Making the graph shorter than it needs to be

B. Starting the vertical axis at a point greater than zero

C. A gap in the vertical axis

D. Making the graph taller than it needs to be