The mean finish time for a yearly amateur auto race was 187.51 minutes with a standard deviation of 0.343 minute.
The winning car,
driven by Ted, finished in 186.67 minutes. The previous year's race had a mean finishing time of
112.1 with a standard deviation of 0.131 minute. The winning car that year, driven by Susan, finished in 111.69
minutes
.
Find their respective z-scores. Who had the more convincing victory?
Ted had a finish time with a z-score of
Susanhad a finish time with a z-score of
(Round to two decimal places as needed.)
Which driver had a more convincing victory?
OA. Susan had a more convincing victory because of a higher z-score.
OB. Ted a more convincing victory because of a lower z-score.
OC. Susan had a more convincing victory because of a lower z-score.
OD. Ted a more convincing victory because of a higher z-score.