et I 1. For each of the following studies, say whether you would use a t test for depen- dent means or a t test for independent means. (a) A researcher randomly assigns a group of 25 unemployed workers to receive a new job skills program and 24 other workers to receive the stan- dard job skills program, and then measures how well they all do on a job skills test. (b) A researcher measures self-esteem in 21 students before and after taking a difficult exam. (c) A researcher tests reaction time of each member of a group of 14 indi- viduals twice, once while in a very hot room and once while in a normal- temperature room