1. Research question: Do patients in the treatment group gain more weight than patients in the control group? There were 65 patients in the treatment group and 67 patients in the control group. Weight gain was measured in pounds. Which of the following procedures should be used? Single sample proportion z test Single sample mean t test Two independent proportions z test Two independent means t test 2. Researchers want to test the following hypotheses: Ha: P. - P= = 0 H.: P. - P: = 0 Where p. is the proportion passing in the population of Group 1 and p. is the proportion passing in the population of Group 2. They have collected the following data to test these hypotheses; Sample Data Group 1 Group 2 Pass S Fail 16 14 When using these data to test the stated hypotheses, can the researchers use the normal approximation method? Yes, the normal approximation method may be used No. the normal approximation method should not be used