AP Statistics Multiple Choice practice: Chapter 1
1) The statistics below provide a summary of the distribution of heights, in inches, for a simple random
sample of 200 young children.
Mean: 46 in
Median: 45 in
Standard Deviation: 3 inches
First Quartile: 43 inches
Third Quartile: 48 inches
About 100 children in the sample have heights that are:
a) less than 43 inches
b) less than 48 inches
c) between 43 and 48 inches
d) between 40 and 52 inches
e) more than 46 inches
2) The stemplot below shows the yearly earnings per share of stock for two different companies over a
sixteen-year period.
Company A
Company B
0
58, 75, 96, 98
92, 91, 90, 82, 78, 43, 38, 26
1
01, 10, 17, 21, 43, 43, 53, 65, 73
49, 47, 44, 00
2
09, 27, 29
73, 27, 05, 02
3
(The way this plot reads is that the dollar amount is the stem, and the cents amount is on either side. So
the first number under Company B is $0.58)
Which of the following statements is true?
a) The median earnings of Company A is less than the median earnings of Company B
b) The range of the earnings of Company A is less than the range of the earnings of Company B
c) The third quartile of Company A is smaller than the third quartile of Company B
d) The mean of the earnings of Company A is greater than the mean of the earnings of Company
B
e) The interquartile range of Company A is twice the interquartile range of Company B.
3) Which of the following is the best description of the shape of this distribution?
a) Roughly symmetric
b) Skewed to the right
c) Skewed to the left
4) When asked to describe a distribution on the AP exam, what information should you include
in your description?
5) The scores on a statistics test had a mean of 81 and a standard deviation of 9. One student was
absent on the test day, and his score wasn’t included in the calculation. If his score of 84 was
added to the distribution of scores, what would happen to the mean?
a) Mean will increase
b) Mean will decrease
c) Mean will stay the same