condition mean min max ZT0-3 157.8 157.8 157.8 ZT4-7 242.3 242.3 242.3 ZT8-11 263.15 263.15 263.15 ZT12-15 311.0 311.0 311.0 ZT16-19 248.35 248.35 248.35 ZT20-23 252.35 252.35 252.35