The number of students taking the Scholastic Aptitude Test (SAT) has risen to an all-time high of
Question:
Number of Number of
Times Students
1 ............ 721,769
2 ............ 601,325
3 ............ 166,736
4 ............ 22,299
5 ............ 6,730
a. Let x be a random variable indicating the number of times a student takes the SAT.
Show the probability distribution for this random variable.
b. What is the probability that a student takes the SAT more than one time?
c. What is the probability that a student takes the SAT three or more times?
d. What is the expected value of the number of times the SAT is taken? What is your interpretation of the expected value?
e. What is the variance and standard deviation for the number of times the SAT is taken?
Distribution
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Related Book For
Statistics For Business And Economics
ISBN: 9780538481649
11th Edition
Authors: David R. Anderson, Dennis J. Sweeney, Thomas A. Williams
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