condition mean min max ZT0-3 14.899999999999999 14.899999999999999 14.899999999999999 ZT4-7 33.8 33.8 33.8 ZT8-11 45.1 45.1 45.1 ZT12-15 27.25 27.25 27.25 ZT16-19 14.0 14.0 14.0 ZT20-23 45.849999999999994 45.849999999999994 45.849999999999994