A simple linear regression analysis based on a data set that consists of 3,000 observations yielded the following estimated equation:
Q = 100 -1.25P
If the coefficient of determination is 0.64, then the correlation coefficient is equal to
A) 0.64
B) 0.72
C) 0.80
D) 0.88

Question

Quizplus · Accepted Answer

The coefficient of determination (R²) is 0.64. The correlation coefficient (R) is the square root of R². Since R² = 0.64, R = √0.64 = 0.80.

A Simple Linear Regression Analysis Based on a Data Set