Pay equity for men and women has been an ongoing source of conflict for a number of years in North America. Suppose that a statistics practitioner is investigating the factors that affect salary differences between male and female university professors.

He believes that the following variables have some impact on a professor€™s salary:

Number of years since first degree 

Average score on teaching evaluations

Number of articles published in refereed journals

A random sample of 100 university professors was taken and the following data were recorded:

Column 1: Annual salary

Column 2: Number of years since first degree

Column 3: Highest degree

Column 4: Mean score on teaching evaluation

Column 5: Number of articles published

Column 6: Gender

a. Can the statistics practitioner conclude that the model is valid?

b. Can the statistics practitioner conclude at the 5% significance level that there is gender discrimination?

[l if Highest degree is a Ph.D. l0if Highest degree is not a Highest degree - Ph.D. S1 if Professor is male lo if Professor is female Gender