14-30 Introduction to Multiple Regression
-Referring to Scenario 14-7 $X _ { 1 } \text {, holding } X _ { 2 }$

Short Answer

14-30 Introduction to Multiple Regression
-Referring to Scenario 14-7, the estimate of the unit change in the mean of Y per unit change in $X _ { 1 } \text {, holding } X _ { 2 }$ constant, is ________.