condition mean min max ZT0-3 68.1053 68.1053 68.1053 ZT4-7 63.098600000000005 63.098600000000005 63.098600000000005 ZT8-11 70.17875000000001 70.17875000000001 70.17875000000001 ZT12-15 54.702600000000004 54.702600000000004 54.702600000000004 ZT16-19 77.77279999999999 77.77279999999999 77.77279999999999 ZT20-23 71.74244999999999 71.74244999999999 71.74244999999999