For the 1,000-meter running event, Abby's mean time is 4.5 minutes with a standard deviation of 0.75 minutes. For the 800-meter event, Abby's mean time is 3.2 minutes with a standard deviation of 0.4 minutes. In the last track
meet, Abby ran the 1,000-meter race in 4.1 minutes and the 800-meter race in 3 minutes. In which event did Abby
have a better performance?
ause this z-score was closer to the mean than the Z-score
A Abby had a better performance in the 1,000-
for the 800-meter.
B Abby had a better performance in the 800-meter because this z-score was closer to the mean than the Z-score for
the 1,000-meter.
C Abby had a better performance in the 1,000-meter because this z-score was farther below the mean than the z-
score for the 800-meter.
D Abby had a better performance in the 800-meter because this z-score was farther below the mean than the z-
score for the 1,000-meter.