condition mean min max ZT0-3 26.45 26.45 26.45 ZT4-7 18.2 18.2 18.2 ZT8-11 12.0 12.0 12.0 ZT12-15 6.35 6.35 6.35 ZT16-19 36.6 36.6 36.6 ZT20-23 14.899999999999999 14.899999999999999 14.899999999999999