Question: 8. Test hypotheses about single coefficients in a multiple regression model. In particular (a) What is the difference between a one-tail and a two-tail test?

8. Test hypotheses about single coefficients in a multiple regression model. In particular

(a) What is the difference between a one-tail and a two-tail test?

(b) How do you compute the p-value for a one-tail test, and for a two-tail test?

(c) What is meant by "testing the significance of a coefficient"?

(d) What is the meaning of the /-values and p-values that appear in your computer output?

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