Each year America.EDU ranks the best paying college degrees in America. The following data show the median starting salary, the mid-career salary, and the percentage increase from starting salary to mid-career salary for the 20 college degrees with the highest mid-career salary (America.EDU website, August 29, 2013).
 

a. Using a class width of 10, construct a histogram for the percentage increase in the starting salary.

b. Comment on the shape of the distribution.

c. Develop a stem-and-leaf display for the percentage increase in the starting salary.

d. What are the primary advantages of the stem-and-leaf display as compared to the histogram?

Degree Starting Salary Mid-Career Salary % Increase Aerospace engineering Applied mathematics Biomedical engineering Chemical engineering Civil engineering Computer engineering Computer science Construction management Economics 59,400 108,000 101,000 82 56,400 79 54,800 101,000 84 64,800 108,000 67 53,500 93,400 75 61,200 87,700 43 56,200 97,700 74 50,400 87,000 73 48,800 60,800 47,500 97,800 100 Electrical engincering 104,000 71 Finance 91,500 93 Government 41,500 88,300 113 Information systems Management info. systems 49,300 87,100 77 50,900 90,300 77 Mathematics 46,400 88,300 90 Nuclear enginecring Petroleum engineering Physics Software engineering Statistics 63,900 104,000 63 93,000 157,000 69 50,700 99,600 96 56,700 91,300 93,400 61 50,000 87