Test the claim that the mean weight loss is greater than 0., Ask an Expert

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When 40 people used the weight watchers diet for one year their mean weight loss was 3.0 lbs. Assume the standard deviation of all such weights is 4.9 lbs and use a significance level to test the claim that the mean weight loss is greater than 0. Based on these results does the diet appear to be effective. Does the diet appear to have practical significance.

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Category:- Statistics and Probability
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