*1+x2 n1 + n2 2 = (P1 -P2) -(P1 - P2) A. [P = 0.636 and z = -2.269 B. P = 0.6169 and z = - 2.257 C. P = 0.6169 and z = - 2.269 D. [p = 0.636 and z = -2.257 Part D: The standardized test statistic falls ( Responses: within, outside of) the rejection zone. This means we Responses: have, don't have) significant evidence to reject the null. We Responses: can, cannot) conclude that there is a difference between the proportions of males and females that would return the $10 bill to the cashier 4. You have been looking at how much money is spent on name brand batteries. Tired and upset, at what you believe to be a waste of money, you do research on a name brand battery versus a generic brand to see if there is a difference. Let be the mean lifetime (in days) for a name brand battery and H2 be the mean lifetime (in days) of the generic battery. Use a = 0.05. Name Brand Generic Brand 32 40 n (batteries) 45 48 sample mean 8 10 sample standard deviation Part A: Which formula represents the test statistic for the test? A