Diets Developers of diets like to advertise that their diets

Diets. Developers of diets like to advertise that their diets produce significant weight loss results. A new diet has been developed and several studies were done to investigate the effectiveness of the diet. In each study the average number of pounds lost was of interest, and researchers would like to show that dieters lost a significant amount of weight. a) Identify the appropriate null and alternative hypotheses to test the researchers u claim. b) Suppose that an average weight loss of 1 pound (x = 1 ) and standard deviation of s = 7 pounds were found in each of the following studies. Further, assume weight loss is normally distributed. For each case, compute the test statistic, find the approximate p-value , and make a decision about the null hypothesis using an ? = 0.05 level of significance. Round t statistics to two decimals. a sample of size n = 120 was used t =? df = ? The p-value corresponding to the correct test statistic is 0.331. What is the strength of the evidence based on the p-value? A. Little or no evidence B. Weak evidence C. Moderately strong evidence D. Strong evidence E. Extremely strong evidence Decision: A. Reject the null hypothesis because p < ? B. Reject the null hypothesis because p > ? C. Fail to reject the null hypothesis because p < ? D. Fail to reject the null hypothesis because p > ?

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