Based on data collected over several sessions, a statistically minded trainer of office typists modeled the linear relationship between the number of hours of training a typist receives and the typist's speed (in words per minute) with the equation ModifyingAbove speed with caret equals 10.9 plus 5.7 (hour ). After some training, one of the typists was told that the speed he attained had a residual of 4.1 words per minute. How should he interpret this?