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Problem 2


8.5 Small-Sample Test of Hypothesis about a Population Mean

The Natural Foods Diet claims that people lose an average of ten pounds in two months on the plan.  A study of 26 people on the diet lost an average 8.9 pounds in two months.  The standard deviation was 3.25 pounds.  Use a 2% significance level to test the claim that the diet helps people lose an average of 10 pounds in two months.


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