2 Question 7: 3 4 Kevin Horn is the national sales manager for National Textbooks Inc. He has a sales staff of 40 5 who visit college and university professors. Each Saturday morning he requires his sales staff to send him a report. This report includes, among other things, the number of professors visited 6 during the previous week. Listed below, ordered from smallest to largest, are the number of visits 7 last week. 8 9 0 - 2 38 40 41 45 48 48 50 50 51 51 52 52 53 54 55 55 55 56 56 57 3 59 59 59 62 62 62 63 64 65 66 66 67 67 69 69 71 77 78 79 79 4 6 1. Determine the median number of calls. 7 2. Determine the first and third quartiles. 3. Determine the first decile and the ninth decile. 4. Determine the 33rd percentile. 04 5 Advertising expenses are a significant component of the cost of goods sold. Listed below is a frequency distribution showing the advertising expenditures for 60 manufacturing companies. Estimate the mean, the median, and the standard 6 deviation of advertising expense. 8 9 Advertising Expenditure Number of ($ millions) Companies $25 to under $35 2 35 to under 45 10 45 to under 55 21 55 to under 65 16 65 to under 75 05 Total 60 07