Mathematics, 12.06.2020 02:57 hahah265

A college admissions director wished to estimate the mean age of all students currently enrolled. In a random sample of 20 students, the mean age is found to be 22.9 years. From past studies, the standard deviation is known to be 1.5 years, and the population is normally distributed. Construct a confidence interval for 95% and 99% of the population mean age.

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