Chapter 14 - Section 14.3 - Assess Your Understanding - Applying the Concepts - Page 722: 20e

The coefficient for $x_1$: if the percent of the time the shooter’s aim was on target increases by 1 and the percent of the time the shooter’s aim was within a certain region, the distance the barrel of the pistol moves horizontally while aiming and the distance the barrel of the pistol moves vertically while aiming remain constant, then the vertical distance that the bullet hole was from the target, will decrease by 0.13 mm, on average. The coefficient for $x_2$: if the percent of the time the shooter’s aim was within a certain region increases by 1 and the percent of the time the shooter’s aim was on target, the distance the barrel of the pistol moves horizontally while aiming and the distance the barrel of the pistol moves vertically while aiming remain constant, then the vertical distance that the bullet hole was from the target, will increase by 0.21 mm, on average. The coefficient for $x_3$: if the distance the barrel of the pistol moves horizontally while aiming increases by 1 mm and the percent of the time the shooter’s aim was on target, the percent of the time the shooter’s aim was within a certain region, and the distance the barrel of the pistol moves vertically while aiming remain constant, then the vertical distance that the bullet hole was from the target, will increase by 0.13 mm, on average. The coefficient for $x_4$: if the distance the barrel of the pistol moves vertically while aiming increases by 1 mm and the percent of the time the shooter’s aim was on target, the percent of the time the shooter’s aim was within a certain region, and the distance the barrel of the pistol moves horizontally while aiming remain constant, then the vertical distance that the bullet hole was from the target, will increase by 0.22 mm, on average.

Given above.