Ironman virtual club, part 2.

Do the data in Exercise 42 suggest that the male athletes have a lower average overall completion time lesser than the female athletes?

a) Write the null and alternative hypotheses.

b) Find a 95% confidence interval for the difference in mean overall completion time and interpret your interval.

c) Test the hypothesis stated above in part

a, and find the P-value.

d) Interpret the P-value, and state your conclusion. Does the test suggest that the male athletes have a lower average overall completion time than the female athletes?