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Ija Ija
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2 weeks ago
The developers of a weight-loss program would like to test the hypothesis that the standard deviation for the weight loss, in pounds, over a one-month period is equal to 3.0 pounds. The following table shows the one-month weight loss, in pounds, of seven individuals who participated in a weight-loss program.



Test the hypothesis using α = 0.10.
Textbook 

Business Statistics


Edition: 2nd
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rockshimrockshim
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More questions for this book are available here
Calculate the sample variance.


Because χ2 = 21.78 is more than the Upper  = 12.592 for a two-tail test, we reject the null hypothesis. We have enough evidence to conclude that the standard deviation for the weight loss, in pounds, over a one-month period is not equal to 3.0 pounds.

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