Question: In a study examining cardiovascular responses to embarrassment, Harris asked participants to sing the star spangled banner in front of a video camera while she recorded their heart rate and blood pressure. The data indicate that heart rate increases quickly during th first minute of an embarrassing episode, then drops quickly during the second minute. Blood pressure, on the other hand, increases steadily for a full 2 minutes before gradually returning to normal. Following are heart rate data similar to the research results. Do the data show significant changes in heart rate over time? Use a repeated-measures ANOVA with alpha=.05.

Person Baseline 1st min 2nd min P

A 74 88 75 237 N=12

B 76 90 77 243 G=960

C 78 89 76 243 sum of x squared =77.208

D 76 85 76 237

M=76 M=88 M=76

SS=8 SS=14 SS=2