(Answered) Determining the confidence interval

Statistics

Problem: In a conversation with my department head, we discussed what we thought the average undergraduate GPA was for graduate students at Penn State. A random sample of 61 students produced a mean of 3.5 and a 0.33 standard deviation.

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Question: Calculate and interpret a 99% confidence interval. Please show steps how you get an answer and please be clear in your explanation.

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