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# Estimate the mean age of all runners who participate in a marathon. A random sample of 36 participants indicated a mean age of 31.4 yrs.

Estimate the mean age of all runners who participate in a marathon. A random sample of 36 participants indicated a mean age of 31.4 yrs. It is known that the population standard deviation of ages is o=7.2 yrs.Construct a 97% confidence interval for the population mean age. Express confidence interval to 2 decimal places.

Estimate the mean age of all runners who participate in a marathon. A random sample of 36participants indicated a mean age of 31.4 yrs. It is known that the population standarddeviation of ages...