condition mean min max ZT0-3 153.35000000000002 153.35000000000002 153.35000000000002 ZT4-7 221.9 221.9 221.9 ZT8-11 210.5 210.5 210.5 ZT12-15 171.05 171.05 171.05 ZT16-19 177.15 177.15 177.15 ZT20-23 201.55 201.55 201.55