Math Exam Worksheet With Answer Key - Math 103/gracey Page 19
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22Provide an appropriate response.
49) For data which are heavily skewed to the right, P 10 is likely to be closer to the median than P 90 .
49)
True or false?
A) True
B) False
50) If all the values in a data set are converted to z-scores, the shape of the distribution of the z-scores
50)
will be bell - shaped regardless of the distribution of the original data. True or false?
A) True
B) False
51) In a data set containing n values, the 67th percentile can be found as follows:
51)
67
P 67 =
∙ n.
100
True or false?
A) False
B) True
52) Which of the following statements regarding percentiles is true? (More than one statement may be
52)
true).
A : In any data set, P 90 is greater than P 80
P 10 + P 90
B: In any data set,
is equal to Q 2
2
C: In a set of 20 test scores, the percentile of the second highest score is 95
A) B
B) A
C) C
D) All of the above
19
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