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A sample of 65 night-school students ages is obtained in

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A sample of 65 night-school students' ages is obtained in order to estimate the mean age of night-school students. x = 25.1 years. The population variance is 25

(a) Give a point estimate for ?. (Give your answer correct to one decimal place.)

(b) Find the 95% confidence interval for ?. (Give your answer correct to two decimal places.)

Lower Limit

Upper Limit

(c) Find the 99% confidence interval for ?. (Give your answer correct to two decimal places.)

Lower Limit

Upper Limit

Reference no: EM13612888

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