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distributed population with a sample...

A random sample of size 15 is taken from a normally distributed population with a sample mean of 75 and a sample variance of 25. The upper limit of a 95% confidence interval for the population mean is equal to:

A. 79.273

B. 74.727

C. 77.530

D. 72.231

A. 79.273

B. 74.727

C. 77.530

D. 72.231

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