condition mean min max ZT0-3 17.45 17.45 17.45 ZT4-7 25.2 25.2 25.2 ZT8-11 37.75 37.75 37.75 ZT12-15 34.25 34.25 34.25 ZT16-19 36.45 36.45 36.45 ZT20-23 34.849999999999994 34.849999999999994 34.849999999999994