In a study which investigated the effects of amount of coffee consumption and mood (good or bad) on driving speed, the magnitude of effects estimates were as follows: Coffee:
; Mood:
; Coffee × Mood:
. Together, how much of the variability in driving speed is accounted for by Coffee, Mood, and their interaction?
A) cannot determine
B) .49
C) .51
D) .19

Question

In a study which investigated the effects of amount of coffee consumption and mood (good or bad) on driving speed, the magnitude of effects estimates were as follows: Coffee:
 ; Mood:
 ; Coffee × Mood:
 . Together, how much of the variability in driving speed is accounted for by Coffee, Mood, and their interaction?
A) cannot determine 
B) .49 
C) .51 
D) .19

Quizplus · Accepted Answer

The magnitude of effects estimates for coffee, mood, and their interaction indicate that they account for 51% of the variability in driving speed. Therefore, the correct answer is C.

In a Study Which Investigated the Effects of Amount of Coffee