condition mean min max ZT0-3 36.55 36.55 36.55 ZT4-7 4.8 4.8 4.8 ZT8-11 24.85 24.85 24.85 ZT12-15 22.45 22.45 22.45 ZT16-19 37.0 37.0 37.0 ZT20-23 13.899999999999999 13.899999999999999 13.899999999999999