Frequencies Quantiles Level Count Prob Trucker 254 0.50800 100.0% maximum 58 Car Driver 246 0.49200 99.5% 56.495 Total 500 1.00000 97.5% 55 90.0% 51 N Missing0 75.0% quartile 48 2 Levels 50.0% median 45 25.0% quartile 41 10.0% 38 2.5% 34 0.5% 27.505 0.0% minimum 22 Summary Statistics Mean 44.506 Std Dev 5.170632 Std Err Mean 0.2312377 Jpper 95% Mean 44.960319 Lower 95% Mean 44.051681