What is a Fisher Z, how is it obtained, and what is it used for?
Answer to relevant QuestionsAre there ever any circumstances when a correlation such as Pearson r can be interpreted as evidence for a causal connection between two variables? If yes, what circumstances? What information should be included in the report of a Chi square test of contingency? What is a multiple R? How is multiple R2 interpreted? Draw three overlapping circles to represent the variance and shared variance among X1, X2 and Y, and label each of the following: sr21, sr22, 1 – R2. What interpretation is given to the three way overlap? How do you deduce ...If you have k groups, why do you only need k-1 dummy variables to represent group membership? Why is it impossible to include k dummy variable as predictors in a regression when you have k groups?
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