condition mean min max ZT0-3 7441.155134 7441.155134 7441.155134 ZT4-7 6260.9920205 6260.9920205 6260.9920205 ZT8-11 5788.47499 5788.47499 5788.47499 ZT12-15 6885.880309 6885.880309 6885.880309 ZT16-19 5732.1467545 5732.1467545 5732.1467545 ZT20-23 4638.0142805 4638.0142805 4638.0142805