the mean age of college graduate in the united states is 25 years.

the mean age of college graduate in the united states is 25 years.

the mean age of college graduate in the united states is 25 years. a sample of 100 udc graduates gives a mean age of 28 years with a standard deviation of 8 years.

a. Construct a 95% confidence interval for the mean age of all UDC students at graduation.


b. b. Construct a 99% confidence interval for the mean age of all UDC students at graduation.

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