A researcher wants to examine the effect of violent computer games on verbal aggression. She has college students play 45 min, 30 min, 15 min, or no minutes of a violent computer games. Which of the following best represents a nondirectional alternative hypothesis for this study?
A. Ha: µ45min > µ30min > µ15min > µ0min
B. Ha: µ45min = µ30min = µ15min = µ0min
C. Ha: There will be no difference in verbal aggression after playing 45 min, 30 min, 15 min of no minutes of a violent computer game.
D. Ha: There will be a difference in verbal aggression after playing 45 min, 30 min, 15 min of no minutes of a violent computer game.
Ans: D
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