Calculate the chi square statistic.
χ2 =
Short answer, 5 points each.
- Why does the tobt change when we use dependent v. independent samples t-tests?
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- Why does the tcrit change when we use dependent v. independent samples t-tests?
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- How can we figure out how many people we have in a sample, given a specific degrees of freedom? Answer for both independent and dependent samples tests.
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- Which is preferable, a dependent samples test or an independent samples? Give two reasons why.
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- Explain pooled variance.
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- Given the choice, we won’t use the chi-square test. What’s so wrong with it? What are the assumptions associated with the chi-square?
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Extra credit.
Why do we care about homogeneity of variance?
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