Calculate the multiple regression equation for the research situation in Exercise 20.

a. What are the predicted absences \(\left(Y^{\prime}\right)\) for someone with four friends and lives 7 miles from campus?

b. What are the predicted absences \(\left(Y^{\prime}\right)\) for someone with two friends and lives 12 miles from campus?

c. What are the predicted absences \(\left(Y^{\prime}\right)\) for someone with one friend and lives 8 miles from campus?

Exercise 20

An instructor hypothesizes that the number of times a student is absent from her class is related to the number of friends who are also taking the class and the distance (in miles) the student lives from campus:

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Friends Distance Absences Friends Distance Absences (X) (X2) (n) (X) (X2) (n) N 29 29 29 Friends Mean 2.31 9.67 3.82 Distance .09 - SD .69 3.13. 2.29 Absences .26 .32