Researchers obtained weight loss data from a sample of dieters. The before and after weights of 12 s
Question: Researchers obtained weight loss data from a sample of dieters. The before and after weights of 12 subjects are recorded and the differences are computed. These differences have a mean of \(\bar{D}=133.75\) pounds, and a standard deviation of \({{s}_{d}}=17.07\) pounds. Test the claim at the 0.05 significance level that the diet is an effective method of losing weight.
(a) State the null and alternative hypotheses
(b) Find the t-statistics
(c) Find the critical value
(d) Construct a 90% confidence interval for the difference between the two means
(e) Does the diet appear to be effective in reducing weight?
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See Answer: The solution consists of 2 pages
Deliverable: Word Document![](/images/msword.png)
Deliverable: Word Document
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