condition mean min max ZT0-3 32.3 32.3 32.3 ZT4-7 12.2 12.2 12.2 ZT8-11 23.849999999999998 23.849999999999998 23.849999999999998 ZT12-15 24.6 24.6 24.6 ZT16-19 14.6 14.6 14.6 ZT20-23 27.6 27.6 27.6