The mean finish time for a yearly amateur auto race was 187.45 minutes with a standard deviation of 0.383 minute. The winning car driven by perry, finished in 186.74 minutes. The previous years race had been a mean finishing time of 112.2 with a standard deviation of 0.112 minute. The winning car that year driven by tammy finished in 111.95 minutes. Find their respective Z-scores. who had a more convincing victory.