Question 1

In a multiple regression model y' = -11 + 5x1 + 21x2 + 11x3 + 3x4, if the x1 value changes by 2, then the predicted value for y will change by

Accepted Answer

A)  10 
B)  42 
C)  -1 
D)  29

Question 2

When r is not significantly different from 0, the best predictor of y is the ____________ of the data values of y.

Accepted Answer

The answer of When r is not significantly different from...

Question 3

If the correlation coefficient is 0.930, what is the unexplained variation?

Accepted Answer

A)  7% 
B)  93% 
C)  13.5% 
D)  86.5%

Exam 10: Correlation and Regression

In a multiple regression model y' = -11 + 5x₁ + 21x₂ + 11x₃ + 3x₄, if the x₁ value changes by 2, then the predicted value for y will change by