It's a standard anova table, where you have 3 parameters, besides the constant term. What don't you understand?

Gender is a wothless variable here and starting salary can be either kept of tossed.

The CI for the MEAN or expected salary (instead of a prediction interval for the 41 male) starts

with the point estimator.

So plug in the x's into your equation.

y=27946.57894 + 1665.251558 (5) + 0.266374185 (30 or 30,000 I guess) + -3285.541043 (0 for males, go figure)

then the st dev is not easy at all.

I use matrices, because you will need the covariances between the variables, the estimate of s is

and the degrees of freedom for the t is 39.