CHAPTER 4. HOW TO TELL A STATISTICAL STORY WITH A GRAPH Table 4.5. An excerpt from the file salary . xls. ID Experience Gender Male IQ Earnings 20 M 107 55419 20 F 0 110 57056 10 M 1 139 66260 20 F 0 145 65385 20 M 1 124 64111 10 F 0 145 63975 20 F 121 56934 20 M 1 114 59868 20 M 1 1 127 62944 10 20 F 125 60960apil to illustrate the story. 5. 1Q gender differences. The file salary. x1s (an excerpt is in Table 4.5) contains data on salary, 1Q, experience, and gender for a group of people employed at a company. (a) Does salary differ by level of experience? IQ? Gender? (b) After controlling for differences in IQ and experience, does salary differ by gender