condition mean min max ZT0-3 28.25 28.25 28.25 ZT4-7 38.2 38.2 38.2 ZT8-11 39.25 39.25 39.25 ZT12-15 34.65 34.65 34.65 ZT16-19 26.6 26.6 26.6 ZT20-23 67.55 67.55 67.55