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A sample of63night-school students' ages is obtained in order to estimate the mean age of night-school students. x =25.9years. The population variance is18. (a) Give

A sample of63night-school students' ages is obtained in order to estimate the mean age of night-school students.x=25.9years. The population variance is18.

(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

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