Question: Why is the null hypothesis for a repeated-measures t-test always D =0? Explain how you can tell from both the correlation coefficient and a scatterplot

  1. Why is the null hypothesis for a repeated-measures t-test always D=0?
  2. Explain how you can tell from both the correlation coefficient and a scatterplot the magnitude/strength of a relationship.
  3. Explain the difference between a Chi Square Goodness of Fit Test and a Chi Square Test of Independence.
  4. Explain the difference between the repeated-measure t-test and the independent-samples t-test.

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