Mathematics, 13.10.2020 08:01 seby77L

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? Abby had a better performance in the 1,000-meter because this z-score was closer to the mean than the z-score for the 800-meter.
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.
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.
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

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For the 1,000-meter running event, Abby’s mean time is 4.5 minutes with a standard deviation of 0.75...