Freshmen’s GPAFirst-semester GPAs for a random selection

Chapter 7, Problem 14E

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QUESTION:

Problem 14E

Freshmen’s GPAFirst-semester GPAs for a random selection of freshmen at a large university are shown. Estimate the true mean GPA of the freshman class with 99% confidence. Assume σ = 0.62

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QUESTION:

Problem 14E

Freshmen’s GPAFirst-semester GPAs for a random selection of freshmen at a large university are shown. Estimate the true mean GPA of the freshman class with 99% confidence. Assume σ = 0.62

ANSWER:

Solution

Step 1 of 2

We have to estimate true mean GPA of the freshman class with 99% confidence

Given that assume

Now the sample mean

                                          =

                                           =2.82


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