condition mean min max ZT0-3 38.75 38.75 38.75 ZT4-7 21.4 21.4 21.4 ZT8-11 30.0 30.0 30.0 ZT12-15 39.5 39.5 39.5 ZT16-19 43.95 43.95 43.95 ZT20-23 14.95 14.95 14.95