9. Here are the data for blue whales. Test to see if males are as the same as females. Make sure you follow all the steps of a hypothesis test (give H0, H1, etc.). Give your conclusion! (6 pts.) Females: 111, 99, 98, 115, 102, 98, 98, 116, 102, 111, 105, 80, 87 101.69 10.41 2.89 Males: 117, 97, 92, 124, 101, 80, 89, 119, 122, 112, 142 108.64 18.42 5.55 Note: d.f. (Welch's) = 15, = 0.05 All the data are normally distributed.

11. Construct a 90% CI for female blue whales from the second page (see problem 9). (6 pts.)