Statistics for Business: Decision Making and Analysis, 3rd Edition

Exercises

Mix and Match

Match each description on the left with its mathematical expression on the right.

1. Symbol for the explanatory variable in a regression	(a) r2
2. Symbol for the response in a regression	(b) b0
3. Fitted value from an estimated regression equation	(c) $\overline{y}$
4. Residual from an estimated regression equation	(d) b1
5. Identifies the intercept in a fitted line	(e) X
6. Identifies the slope in a fitted line	(f) $\widehat{y}$
7. Percentage variation described by a fitted line	(g) b0 + b1
8. Symbol for the standard deviation of the residuals	(h) Y
9. Prediction from a fitted line if $x=\overline{x}$	(i) $y-\widehat{y}$
10. Prediction from a fitted line if x = 1	(j) se

True/False

Mark each statement True or False. If you believe that a statement ...