Freshmen GPAs First-semester GPAs for a random selection of freshmen at a large university are shown below. Estimate the true mean GPA of the freshman class with 90% confidence. Assume o = 0.62. Use a graphing calculator and round the answers to two decimal places. Assume the population is normally distributed. 1.9 3.2 2 2.9 2.7 3.3 3.5 3.8 3.9 2.7 2 2.4 2 2.9 2.5 2.7 2.8 3.2 3 3.8 2.8 1.9 4 2.2 Send data to Excel