Betsy is a survey researcher who knows fromUniversity recordsthat the meanGPA of incoming students is 3.2 with a standard deviation of 0.3. She collects her own sample of 200Memphisstudents and discovers that the meanincoming GPA in her sample is3.5 and the standard deviation in her sample is0.7.

What is the standard error in the theoretical sampling distribution?

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What is the 95% confidence intervalaround thesample estimate?Enter the upper bound (higher value) first, and enter the lower bound (lower value) second.

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Does Betsy's survey generalize to the population of interest, or is there reason for concern? Explain why or why not?

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What if Betsy did not know the population mean and standard deviation? Calculate the standard error of the mean in the theoretical sampling distribution using only the information obtained from the sample.

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