condition mean min max ZT0-3 82.5 82.5 82.5 ZT4-7 62.1 62.1 62.1 ZT8-11 79.0 79.0 79.0 ZT12-15 39.35 39.35 39.35 ZT16-19 88.65 88.65 88.65 ZT20-23 91.25 91.25 91.25