condition mean min max ZT0-3 4.445797499999999 4.05975 4.8318449999999995 ZT4-7 4.10132 4.10132 4.10132 ZT8-11 3.03244 3.03244 3.03244 ZT12-15 0 0 0 ZT16-19 10.02707 10.02707 10.02707 ZT20-23 6.537075 6.537075 6.537075