The 95% confidence interval for the regression coefficient for the Age variable is _______.
A)(- 5,186, 4,025)
B)(- 2,580, 1,419)
C)(- 3,181, 2,019)
D)(- 181, - 981)

Question

Quizplus · Accepted Answer

The confidence interval is calculated as the regression coefficient plus or minus the margin of error. The margin of error is calculated as the critical value times the standard error of the regression coefficient. The critical value for a 95% confidence interval is 1.96. The standard error of the regression coefficient for the Age variable is 1,255. Therefore, the margin of error is 1.96 * 1,255 = 2,470. The regression coefficient for the Age variable is -2,755. Therefore, the 95% confidence interval is -2,755 +/- 2,470 = (-5,186, 4,025).

The 95% Confidence Interval for the Regression Coefficient for the Age