5. The following data are overall grades from an instructor's statistics students gathered from Fall, 2005. Assuming that these values were sampled from a normal population, compute the 98% confidence interval for the mean overall grade for this instructor's statistics students. (7 points for each step) { 59.3, 60.2, 69.1, 70.8, 71.7, 72.3, 73.9, 75.1, 76.1, 80.1, 84.9, 85.3, 88.1, 88.3, 93, 94, 98.6 }. Verify Requirements Step 1, tail areas Step 2, critical value Step 3, E Step 4, conf. int