a.Find the expected value of the number of tests taken. b.Compute the variance and the standard deviation of the number of tests taken.
a.Find the expected value of the number of tests taken. b.Compute the variance and the standard deviation of the number of tests taken.
Practical Management Science
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ISBN:9781337406659
Author:WINSTON, Wayne L.
Publisher:WINSTON, Wayne L.
Chapter2: Introduction To Spreadsheet Modeling
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- A calculus instructor uses computer-aided instruction and allows students to take the midterm exam as many times as needed until a passing grade is obtained. Following is a record of the number of students in a class of 50 who took the test each number of times.
Students |
Number of Tests |
22 |
1 |
15 |
2 |
8 |
3 |
5 |
4 |
a.Find the expected value of the number of tests taken.
b.Compute the variance and the standard deviation of the number of tests taken.
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