condition mean min max ZT0-3 152.10000000000002 152.10000000000002 152.10000000000002 ZT4-7 155.6 155.6 155.6 ZT8-11 186.55 186.55 186.55 ZT12-15 243.8 243.8 243.8 ZT16-19 203.7 203.7 203.7 ZT20-23 180.8 180.8 180.8