Question: 4.4 (a) Using the data in EXECUTIVE.XLS (see exercise 4.1) run a regression of Y on X using Excel. What is the R2? (b) Calculate

4.4

(a) Using the data in EXECUTIVE.XLS (see exercise 4.1) run a regression of Y on X using Excel. What is the R2?

(b) Calculate the correlation between Y and X.

(c) Discuss the relationship between your answers in

(a) and (b).

(d) Redo

(a) for various regressions involving the variables W, X, Y and Z in the data set. Comment on the fit of each of these regressions.

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