The average U.S. adult weight is 180 lbs. with a standard deviation of 15 lbs. A nutritional supplement company claims that a new diet supplement decreases weight. Suppose you were asked to conduct a study to test this company’s claim. So, you administer the supplement to a random sample of adults (n = 100) over a six-month period. At the end of the six months you measure their weight and find a mean weight of 165 for your sample. (1) State the null and alternative hypotheses for this study (2) What is the dependent and independent variable for this study (3) What test statistic/hypothesis test would you select to determine if the two means are significantly difference at the alpha .05 level? (4) What critical value would you use to make your decision to reject or retain the null hypothesis at alpha .05?
The average U.S. adult weight is 180 lbs. with a standard deviation of 15 lbs. A nutritional supplement company claims that a new diet supplement decreases weight. Suppose you were asked to conduct a study to test this company’s claim. So, you administer the supplement to a random sample of adults (n = 100) over a six-month period. At the end of the six months you measure their weight and find a
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