A group of researchers were interested in whether playing the game Dance Dance Revolution (DDR) affected the heart rate of overweight adolescents differently than it affected non-overweight adolescents. Twenty-two adolescents classified as overweight, played DDR for 12 minutes, while the researchers measured each participant's heart rate. On average, the researchers found there was a significant difference between the heart rate of this sample of adolescents and the population of adolescents who were categorized as non-overweight. Which of the following statements is the two tailed research hypothesis for this study? a. There will be no difference in the heart rates of the two groups after both groups play Dance Dance Revolution.
b. The heart rate of the overweight group will be faster than that Of the non-overweight group after both groups play Dance Dance Revolution.
c. The heart rate of the non-overweight group will be faster that of the overweight group after both groups play Dance Dance Revolution.
d. The heart rates of the overweight group and the non-overweight group will differ after both groups play Dance Dance Revolution.