Question

A random sample of size 50 with mean 67.9 is drawn from a normal population. If the S.E of the sample mean is √0.7, find a 95% confidence interval for the population mean.

Answer 1

n = 50, \(\overline{x}\)= 67.

9 95% confidence limits for the population mean µ are

Thus the 95% confidence intervals for estimating µ is given by (66.26, 69.54)