In: Statistics and Probability
Consider a two-sample t-test.
Why is the sign of the t-test arbitrary? .
Why are the degrees of freedom associated with the dependent groups t-test always smaller than the degrees of freedom for the independent groups t-test? Be sure to illustrate the calculation of each type of df.
Describe how one would test the homogeneity of variance in a two-sample t-test. How is this information used in your hypothesis testing?
How would you go about using a confidence interval to illustrate a statistically significant difference (or lack thereof) between two groups?
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