condition mean min max ZT0-3 12.2049 12.2049 12.2049 ZT4-7 24.311149999999998 24.311149999999998 24.311149999999998 ZT8-11 45.1942 45.1942 45.1942 ZT12-15 17.920749999999998 17.920749999999998 17.920749999999998 ZT16-19 16.6428 16.6428 16.6428 ZT20-23 6.04454 6.04454 6.04454