condition mean min max ZT0-3 59.4 59.4 59.4 ZT4-7 25.1 25.1 25.1 ZT8-11 24.0 24.0 24.0 ZT12-15 43.25 43.25 43.25 ZT16-19 41.55 41.55 41.55 ZT20-23 62.35 62.35 62.35