condition mean min max ZT0-3 48.25 48.25 48.25 ZT4-7 49.1 49.1 49.1 ZT8-11 59.7 59.7 59.7 ZT12-15 72.75 72.75 72.75 ZT16-19 56.7 56.7 56.7 ZT20-23 24.5 24.5 24.5