condition mean min max ZT0-3 127.455289 127.455289 127.455289 ZT4-7 140.181252 140.181252 140.181252 ZT8-11 170.7738915 170.7738915 170.7738915 ZT12-15 1781.7003975 1781.7003975 1781.7003975 ZT16-19 236.19359550000001 236.19359550000001 236.19359550000001 ZT20-23 1029.799775 1029.799775 1029.799775