13. A small company that prints custom t-shirts has 6 employees, one of whom is the owner and manager. Suppose the owner makes $120,000 per year and the other employees make between $40,000 and $50,000 per year. One day, the owner decides to give himself a $30,000 raise. Which of the following describes how the company's mean and median salaries would change? (a) The mean and median would both increase by $5,000. (b) The mean would increase by $5,000 and the median would not change. (c) The mean would increase by $6,000 and the median would not change. (d) The median would increase by $6,000 and the mean would not change. (e) The mean would increase by $6,000, but we cannot determine the change in the median without more information 14. The following bar graph gives the percent of owners of three brands of trucks who are satisfied with their truck. 97%- Parceal sakeles FORD CHEVROLET TOYOTA From this graph, we may conclude that: (a) Owners of other brands of trucks are less satisfied than the owners of these three brands. (b) Chevrolet owners are substantially more satisfied than Ford or Toyota owners. (c) There is very little difference in the satisfaction of owners for the three brands. (d) Chevrolet probably sells more trucks than Ford or Toyota. (e) A pie chart would have been a better choice for displaying these data. 15. Find the mean, median, mode, and midrange for each of the following sets of data. a. 17, 10, 14, 16, 10, 16, 16 b. 5, 12, 25, 14, 7, 9, 20, 23 c. Find the population variance and standard deviation for #15 above. d. Find the sample variance and standard deviation for #15 above