Question: Assuming that a sample ( N =504) has a sample standard deviation of 2.26, what is the upper bound of a 95% confidence interval if

Assuming that a sample (N=504) has a sample standard deviation of 2.26, what is the upper bound of a 95% confidence interval if the sample mean is 2.96?

A. 2.76

B. 2.96

C. 3.16

D. 5.94

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