condition mean min max ZT0-3 46.29401208583333 43.880214065000004 48.70781010666666 ZT4-7 50.14469944 46.836683810000004 53.452715069999996 ZT8-11 61.048724066666665 55.166256143333335 66.93119199 ZT12-15 67.19344160166666 61.85370912333333 72.53317408 ZT16-19 83.31413364666668 81.67012387333334 84.95814342 ZT20-23 76.99757805166666 73.46068794333333 80.53446816