0 Question 4 v You are testing to compare the mean weight of college football players versus high school football players. You take random samples of 23 players from each population. The data shows a mean weight of 227 pounds for the college players with a standard deviation of 22 pounds, and a mean of 203 pounds and standard deviation of 20 pounds for the high school players. Is this a T-Test or a Z-Test? '33:} Z-Test since you know the standard deviations '33:} Z-Test since the populations are independent C' T-Test since the sample sizes are less than 30 C' T-Test since the population standard deviations are not known . Question 5 v You are comparing the mean GPA for boys and girls at a school. You are testing to determine whether there is a difference. Select the correct null hypothesis. '3' 101 2J2 3'\" 0 '3' #1 '5 #2 -::ZI::- #1 _ #2 = 0 '3' 101 P2 = 0 Question 6 When comparing two populations with unknown standard deviations, which is the correct test on a calculator? O 2-SampZTest O 2-SampTTest O Z-Test O T-Test