condition mean min max ZT0-3 10.75 10.75 10.75 ZT4-7 2.5 2.5 2.5 ZT8-11 21.049999999999997 21.049999999999997 21.049999999999997 ZT12-15 43.7 43.7 43.7 ZT16-19 30.599999999999998 30.599999999999998 30.599999999999998 ZT20-23 4.4 4.4 4.4