Question: During a recent academic year, approximately 1.7 million students took one or more AP tests. Following is the frequency distribution of the number of AP

During a recent academic year, approximately 1.7 million students took one or more AP tests. Following is the frequency distribution of the number of AP tests taken by students who took one or more AP tests. Number of Tests Frequency (in 1000s) 12345 1 953 423 194 80

Let X represent the number of exams taken by a student who took one or more.

a. Construct the probability distribution for X.

b. Find the probability that a student took exactly one exam.

c. Compute the mean μX.

d. Compute the standard deviation σX.

Number of Tests Frequency (in 1000s) 12345 1 953 423 194 80 29 6 9 7 3 8 1 Total 1692

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