Author Question: If the coefficient of determination is 0.975, then the slope of the regression line: a. must be ... (Read 133 times)

Pineappleeh · **on:** Jul 24, 2018

If the coefficient of determination is 0.975, then the slope of the regression line:
a. must be positive
b. must be negative
c. could be either positive or negative
d. must be 0
e. none of these

Question 2

Given the least squares regression line y = -2.48 + 1.63x, and a coefficient of determination of 0.81, the coefficient of correlation is:
a. -0.85
b. 0.85
c. -0.90
d. 0.90
e. -0.81