A 90% confidence interval for a mean if the sample has n=40 with x=22.9 and s=5.9...

Question

Question

A 90% confidence interval for a mean if the sample has n=40 with x=22.9 and s=5.9 , and the standard error is 0.93 .

Answer 1

Answer #1

df = 40 - 1 = 39

A 90% confidence level, the critical value is t^* = 1.685

The 90% confidence interval for the population mean is

Answer 2

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