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Freshmen’s GPAFirst-semester GPAs for a random selection
Chapter 7, Problem 14E(choose chapter or problem)
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
Questions & Answers
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