The director of a university’s career development center is interested in comparing the starting annual salaries of male and female students who recently graduated from the university and commenced fulltime employment. The director has formed pairs of male and female graduates with the same major and similar grade-point averages. Specifically, she has collected a random sample of 50 such pairs and has recorded the starting annual salary of each person. These data are provided in the file P08_23.xlsx. Find a 95% confidence interval for the mean difference between similar male and female graduates of this university. Interpret your result.