A sociologist is interested in how family income (in 1,000s of dollars) predicts number of books in the home. He produces a regression equation stating that Y = 50 + 0.25(X).
-From this equation, how many books would we predict for a family with an income of $40,000?
A) 40 books
B) 50 books
C) 60 books
D) 80 books

Question

Quizplus · Accepted Answer

The regression equation is Y = 50 + 0.25(X). For an income of $40,000, X = 40 (since income is in thousands). Plugging in, Y = 50 + 0.25(40) = 50 + 10 = 60 books.

A Sociologist Is Interested in How Family Income (In 1,000s