2. Students An admissions director wants to estimate the mean age of all students enrolled at a college. The estimate must be within 1 year of the population mean. Assume the population of ages is...

2. Students An admissions director wants to estimate the mean
age of all students enrolled at a college. The estimate must be within
1 year of the population mean. Assume the population of ages is nor-
mally distributed. Determine the minimum sample size required to
construct a 90% confidence interval for the population mean. Assume
the population standard deviation is 1.2 years.