Calculate the adjusted R² for the 15 cases in Exercise 11.6. Twice in this chapter I said that we were going to ignore the adjusted R², even though it is a perfectly legitimate statistic. Can you tell what it is “adjusting” for?

Exercise 11.6

Using the following (random) data, demonstrate what happens to the multiple correlationwhen you drop out cases from the data set (e.g., use 15 cases, then 10, 6, 5, 4).

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