Question: A random sample of 70 observations from a normally distributed population produced a mean of x = 26.2 and a standard deviation of s =

A random sample of 70 observations from a normally distributed population produced a mean of x = 26.2 and a standard deviation of s = 4.1.

Find an approximate 99% confidence interval for the population mean, .

A. 26.2 .1.26

B. 28.3 .155

C. 26.4 .156

D. 25.1 .169

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