# problem-11.19

problem-11.19 The ANCOVA is performed as follows:

    > res = lm(time ~ age + gender, nym.2002)
    > summary(res)
    ...
    Coefficients:
                Estimate Std. Error t value Pr(>|t|)
    (Intercept)  241.450      6.250   38.63  < 2e-16 ***
    age            1.226      0.155    7.92  6.4e-15 ***
    genderMale   -29.397      3.633   -8.09  1.7e-15 ***
    ...

The difference is estimated to be a half-hour in total time.