The grade point averages GPA for 12 randomly selected colleg

The grade point averages (GPA) for 12 randomly selected college students are shown on the right Assume the population is normally distributed. (a) Find the sample mean. x- (Round to two decimal places as needed) (b) Find the sample standard deviation. s. (Round to two decimal places as needed.) (c) Construct a 99% confidence interval for the population mean A99% confidence interval for the population mean is D. (Round to two decimal places as needed) 2.4 3.3 2.6 19 08 4.0 25 15 36 02 21 31

Solution

First, make a table listing X, GPA