I am having trouble interpreting this chart.
see attatchment
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 $\displaystyle \sqrt{mse}$
and the degrees of freedom for the t is 39.