Problem 315 Points) For each of the following, state whether you would use a t test for dependent means, or a t test for independent means. A. A researcher randomly assigns a group of 63 sixth graders to receive a newly developed math study program and 58 other sixth graders to receive the standard math study program. and then measures how well they do on a math test. B. A pharmaceutical company runs a major advertising campaign for one of their drugs. The company measures 78 doctors' reports of the number of their patients asking about that particular drug during the month before and the month after the advertising campaign. C. A researcher measures the reaction time of each of a group of 22 individuals two times, once while in a very cold room and once while in a normal temperature room. D. A researcher measures the weight of 32 office workers, and compares the weight of 14 who regularly eat at the company cafeteria, with the weight of the 18 who regularly bring lunch from home. A doctor compares the blood pressure measurement of 18 patients who have been taking yoga classes 3 times per week for the past month, with the blood pressure of 16 patients who have not taken any yoga classes for the past month