The number of students taking the Scholastic Aptitude Test (SAT) has risen to an all-time high of more than1.5 million (College Board, August 26, 2008). Students are allowed to repeat the test in hopes of improving the score that is sent to college and university admission offices. The number of times the SAT was taken and the number of students are as follows. Number of TimesNumber of Students 1721,769 2601,325 3166,736 422,299 56,730 What is the expected value of the number of times the SAT is taken? What is your interpretation of the expected value?

We want to find the expected value(mean)

Answered: The number of students taking the…

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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The number of students taking the Scholastic Aptitude Test (SAT) has risen to an all-time high of more than 1.5 million (College Board, August 26, 2008). Students are allowed to repeat the test in hopes of improving the score that is sent to college and university admission offices. The number of times the SAT was taken and the number of students are as follows.
	Number of Times	Number of Students
	1	721,769
	2	601,325
	3	166,736
	4	22,299
	5	6,730



What is the expected value of the number of times the SAT is taken? What is your interpretation of the expected value?