condition mean min max ZT0-3 12.89059 12.89059 12.89059 ZT4-7 12.576798499999999 12.576798499999999 12.576798499999999 ZT8-11 10.732737 10.732737 10.732737 ZT12-15 12.627908000000001 12.627908000000001 12.627908000000001 ZT16-19 11.054829999999999 11.054829999999999 11.054829999999999 ZT20-23 12.4008735 12.4008735 12.4008735