1. NORMAL DISTRIBUTION (25 points) 1. What is the frequency of the following data that are within: 63 95 81 75 90 64 45 58 59 84 72 90 35 38 100 80 68 76 49 83 68 87 60 54 45 58 59 64 63 68 92 45 52 87 76 78 50 75 64 86 a. Solve for the mean and standard deviation. (8 points) formulas: M = 2x 0= (x-1)2 n a.1 Use the table below as your guide to find the mean and standard deviation. (2 points) X x - ul (x - u)2 b. One standard deviation from the mean (3 points) c. Two standard deviation from the mean (3 points) d. Three standard deviation from the mean (3 points)