condition mean min max ZT0-3 199.55 199.55 199.55 ZT4-7 242.7 242.7 242.7 ZT8-11 243.0 243.0 243.0 ZT12-15 161.55 161.55 161.55 ZT16-19 161.6 161.6 161.6 ZT20-23 237.35 237.35 237.35