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. 2.4 3.4 2.9 1.5 0.8 4.0 2.1 1.2 3.6 0.3 2.2 3.1 Question content area bottom Part 1 (a) Find the sample mean. x overbarequals 2.29 (Round to two decimal places as needed.) Part 2 (b) Find the sample standard deviation. sequals enter your response here (Round to two decimal places as needed.)