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Exercise 2.B. For the data given below (nos. 13), nd the mean, median, mode, range, midrange, standard deviation, variance and the coefficient of variation. 1. Cost of notebooks for these sample prizes: 7.95 9.98 5.58 4.99 10.75 6.25 7.63 8.50 8.88 2. Age of college students in ISU: Number of students 3. Number of cups of coffee drunk per day of the sample smokers: 6324786935 4. Louie's test scores for two semesters of mathematics are listed below. The percentage of each semester's grade represented by each score is also given 1st Semester 2nd Semester % of Grade 78 87 15 68 66 15 84 81 15 86 89 15 90 88 40 a. Compute the weighted arithmetic mean and standard deviation for each semester. b. Is Louie improving? Explain your