# Question

A sample of 60 night-school students' ages is obtained in order to estimate the mean age of night-school students years. The population variance is 16.

a. Give a point estimate for .

b. Find the 95% confidence interval for .

c. Find the 99% confidence interval for .

a. Give a point estimate for .

b. Find the 95% confidence interval for .

c. Find the 99% confidence interval for .

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