condition mean min max ZT0-3 67.23618701000001 65.61670716666667 68.85566685333333 ZT4-7 65.191750695 53.47947894 76.90402245 ZT8-11 71.90330846833334 56.944221999999996 86.86239493666667 ZT12-15 59.534451695 50.86631971333333 68.20258367666668 ZT16-19 99.42312541500002 64.77167910666667 134.07457172333335 ZT20-23 105.49352495833332 101.23152055666667 109.75552936