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Chi-square goodness of fit test

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Reference no: EM13925928

Part I. Chi-Square Goodness of Fit Test (equal frequencies)

Four different brands of a pain medication used for chronic back ailments were tested to see if the number of side effects for each brand were the same. The table below lists the results of the reported number of side effects for each brand of pain medication.

Brand A
Brand B
Brand C
Brand D
23
17
33
11

[Hint: Be sure to watch the helper video available on the "Chi-Square Goodness-of-Fit test (equal frequencies)" before attempting this problem. Instructions for performing this test in STATDISK can be found in the Statdisk User Manual.]

Instructions
Answers
1. Use the Chi-Square Goodness-of-Fit test to see if there is a difference between the number of side effects from the different brands of medication. Use a significance level of .01.
Paste results here.

2. What are we trying to show here?
We are trying to check whether the side effects for all brands are same.
So, hypotheses to test the above objective are set as follows:
Null: The number of side effects of pain medicine are same for all four brands.
Alternative: The number of side effects of pain medicine are not same for all four brands.

Reference no: EM13925928

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