At Eastern State University, a study of sex discrimination in salaries is undertaken. The analyst regresses the salary of each teaching professional on the number of years of experience (X1), the number of publications (X2), and the sex of the person (X3, a dummy variable with male coded as 1). She gets the following results:
 = $ 28,563 + $ 2,235X1 + $ 65X2 + $ 1,150X3
sb1 = 386 sb2 = 39 sb3 = 316 Sy|x = 2,690
R2 = .68 Adj. R2 = .67
Interpret the slopes, intercept, and R2. Estimate the salary of a male professor with 7 years of experience and three publications.