condition mean min max ZT0-3 31.15 31.15 31.15 ZT4-7 39.4 39.4 39.4 ZT8-11 46.8 46.8 46.8 ZT12-15 65.6 65.6 65.6 ZT16-19 53.65 53.65 53.65 ZT20-23 52.45 52.45 52.45