condition mean min max ZT0-3 44.55 44.55 44.55 ZT4-7 5.2 5.2 5.2 ZT8-11 33.849999999999994 33.849999999999994 33.849999999999994 ZT12-15 39.5 39.5 39.5 ZT16-19 43.95 43.95 43.95 ZT20-23 25.45 25.45 25.45