condition mean min max ZT0-3 44.4 44.4 44.4 ZT4-7 25.0 25.0 25.0 ZT8-11 22.45 22.45 22.45 ZT12-15 29.45 29.45 29.45 ZT16-19 39.0 39.0 39.0 ZT20-23 17.3 17.3 17.3