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aryaelfkind aryaelfkind
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A month ago
Use the following to answer the questions below:

Zumba, often described as a Latin-inspired dance fitness party, is currently one of the most popular group fitness classes, but its health benefits have been little studied. An exercise science professor at a large university conducted a study to investigate some of the health benefits of Zumba. He recorded the weight of 9 female college students before they began a six week long Zumba program. As part of the program, they took a 60 minute long Zumba class three days a week. At the end of the program, the subjects were weighed again. Of interest is their weight loss, defined as weight before the program started minus weight after completing the program. The results are displayed in the following table.

Student123456789
Before Weight134152145120136129163147131
After Weight131147144121134125156144131
Difference
(Before - After)
351-124730

The mean weight loss for the sample was 2.667 pounds with standard deviation 2.5 pounds. A dotplot of the differences is provided.

A dotplot depicts the results of the mean weight loss. The horizontal axis is labeled, Difference (Before minus After), and ranges from 0 to 6 in increments of 2. The dots are plotted as follows: 1 dot above negative 1, 0, 1, and 2; 2 dots above 3; 1 dot above 4, 5, and 7. There is no dot above 6. All values are approximate.


Test, at the 1% level, if there is evidence that the Zumba program is effective for weight loss. Include all of the details of the test.
Textbook 
Statistics: Unlocking the Power of Data

Statistics: Unlocking the Power of Data


Edition: 3rd
Authors:
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12Jfiscus12Jfiscus
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