condition mean min max ZT0-3 27.3 27.3 27.3 ZT4-7 14.5 14.5 14.5 ZT8-11 40.8 40.8 40.8 ZT12-15 14.95 14.95 14.95 ZT16-19 7.55 7.55 7.55 ZT20-23 13.149999999999999 13.149999999999999 13.149999999999999