condition mean min max ZT0-3 18.2 18.2 18.2 ZT4-7 20.2 20.2 20.2 ZT8-11 36.85 36.85 36.85 ZT12-15 21.5 21.5 21.5 ZT16-19 35.7 35.7 35.7 ZT20-23 64.94999999999999 64.94999999999999 64.94999999999999