A Multiple Regression Analysis Based on a Data Set That

Multiple Choice

A multiple regression analysis based on a data set that consists of 30 observations yielded the following estimated equation:
Q = 120 - 1.1P + 3.7I + 0.90A
Where P is price, I is income, and A is advertising. If the coefficient of determination is 0.80, then the adjusted coefficient of determination is

A) 0.84.
B) 0.78.
C) 0.62.
D) 1.04.