For each part below, (i) state the name of relevant hypothesis test (one sample test for mean #, independent two-sample test for difference of mean /1 - /42, matched pair test for mean of difference pa) and (ii) define parameters and state the null and alternative hypotheses. a) A random sample of 200 chocolate chip cookies made by a machine yields an average weight of 3.1 oz and standard deviation of 0.3 oz. State the null and alternative hypotheses to test whether the population mean weight of chocolate chip cookies is different from 3.0 oz. b) An instructor of intro statistics course wants to test whether students do better on final exam that midterm exam. He used his current class of 100 students as a random sample. Assume that all students took both midterm exam and final exam. c) A group of medical researchers want to compare two different treatments for anorexia (eating disorder). 100 patients are randomly assign to receive either family therapy or cognitive therapy. Each patient's weight was measured before and after receiving treatment and weight gain was calculated