condition mean min max ZT0-3 2.43262 1.9618250000000002 2.903415 ZT4-7 2.485785 2.485785 2.485785 ZT8-11 1.79602 1.79602 1.79602 ZT12-15 0 0 0 ZT16-19 2.383915 2.383915 2.383915 ZT20-23 2.6813200000000004 2.6813200000000004 2.6813200000000004