condition mean min max ZT0-3 27.85 27.85 27.85 ZT4-7 10.3 10.3 10.3 ZT8-11 30.849999999999998 30.849999999999998 30.849999999999998 ZT12-15 2.85 2.85 2.85 ZT16-19 17.65 17.65 17.65 ZT20-23 26.4 26.4 26.4