1. The following results were obtained
from a multiple regression analysis of supermarket profitability.
The dependent variable, Y, is the profit (in thousands of dollars)
and the independent variables, X1 and X2, are the food sales and
nonfood sales (also in thousands of dollars).
ANOVA
DF SS
Regression
2 562.363
Residual
9 225.326
Total
Coefficients
Standard
Error
Intercept
-15.0621
X1
0.0972
0.054
X2
0.2484
0.092
Write the estimated regression equation for the
relationship between the variables.
Compute the coefficient of determination and fully
interpret its meaning.
Carry out a test of whether Y is significantly related to
the independent variables. Use a 0.05 level of significance.
Carry out a test to determine if there is a significant
relationship between X1 and Y. Use a .05 level of
significance.
How many supermarkets were in the sample used here?