condition mean min max ZT0-3 43.15 43.15 43.15 ZT4-7 50.9 50.9 50.9 ZT8-11 40.5 40.5 40.5 ZT12-15 60.55 60.55 60.55 ZT16-19 54.849999999999994 54.849999999999994 54.849999999999994 ZT20-23 76.9 76.9 76.9