condition mean min max ZT0-3 0.85805975 0.6745410000000001 1.0415785 ZT4-7 2.1378500000000003 2.1378500000000003 2.1378500000000003 ZT8-11 2.3796999999999997 2.3796999999999997 2.3796999999999997 ZT12-15 0 0 0 ZT16-19 1.469975 1.469975 1.469975 ZT20-23 1.56739 1.56739 1.56739