Part 2 of 3 a Find the sample mean x 2 32 Round to two decimal places as needed b Find the sample standard deviation S Round to two decimal places as needed The grade point averages GPA for 12 randomly selected college students are shown on the right Complete parts a through c below Assume the population is normally distributed Ints U of NIN 2 2 1 7 2 3 0 3 5551 MOT 3 5 0 5 1 5 2 1 2 70 4 0 3 6 3 4 243