condition mean min max ZT0-3 1711.683143 1711.683143 1711.683143 ZT4-7 1869.2631084999998 1869.2631084999998 1869.2631084999998 ZT8-11 1637.8952694999998 1637.8952694999998 1637.8952694999998 ZT12-15 1341.993038 1341.993038 1341.993038 ZT16-19 1525.8207499999999 1525.8207499999999 1525.8207499999999 ZT20-23 1603.5309240000001 1603.5309240000001 1603.5309240000001