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chi squared tests

Chi-square analysis can be used with both Goodness-of-Fit Tests and with Tests for Independence. There are specific instances when each test should be used based on the information given in the problem.

You need to do the following:
•Describe a situation where a Goodness-of-Fit Test could be used. Include as much detail as possible with this example. Explain why this test is appropriate.
•Give an example of when a Test for Independence would be used. Include as much detail as possible with this example. Explain why this test is appropriate.

Solution Preview

We use chi squared tests when we have frequency data ( i.e., we are counting the number of times an outcome occurred instead of calculating a mean score across many participants). There are two types of chi squared tests and we use them to address different types of questions.

Goodness of fit tests should be used when we are measuring a single variable and we wonder what the frequency distribution on that variable looks like. For example, we wonder whether ...

Solution Summary

Explains when to use goodness of fit and test of independence for chi squared tests.

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