condition mean min max ZT0-3 110.7244462075 96.49737591499999 124.9515165 ZT4-7 27.68524227 23.044558375 32.325926165 ZT8-11 34.023180195 23.092834265 44.953526125 ZT12-15 48.421048799999994 47.179913045 49.662184554999996 ZT16-19 47.894914145 46.800411100000005 48.98941719 ZT20-23 48.5836040825 48.291330925 48.87587724