A shortage of candidates has required school districts to pay higher salaries and offer extras to attract and retain school district superintendents. The following data show the annual base salary ($1000s) for superintendents in 20 districts in the greater Rochester, New York, area

(The Rochester Democrat and Chronicle, February 10, 2008).

187 184 174 185 175 172 202 197 165 208 215 164 162 172 182 156 172 175 170 183 Use classes of 150–159, 160–169, and so on in the following.

a. Show the frequency distribution.

b. Show the percent frequency distribution.

c. Show the cumulative percent frequency distribution.

d. Develop a histogram for the annual base salary.

e. Do the data appear to be skewed? Explain.

f. What percentage of the superintendents make more than $200,000?