6.2.26-T Question Help The grade point averages (GPA) for 12 randomly selected college students are shown on the right Complete parts (a) through (c) below. 2.1 34 27 0 Assume the population is normally distributed. 16 08 40 2.2 15 3.9 02 24 3.3 (a) Find the sample mean x= 2.34 (Round to two decimal places as needed.) (b) Find the sample standard deviation s= 5760 (Round to two decimal places as needed.)