condition mean min max ZT0-3 39.55 39.55 39.55 ZT4-7 9.0 9.0 9.0 ZT8-11 38.65 38.65 38.65 ZT12-15 59.05 59.05 59.05 ZT16-19 39.05 39.05 39.05 ZT20-23 42.8 42.8 42.8