condition mean min max ZT0-3 8.746030000000001 8.746030000000001 8.746030000000001 ZT4-7 13.63795 13.63795 13.63795 ZT8-11 7.458705 7.458705 7.458705 ZT12-15 3.55042 3.55042 3.55042 ZT16-19 3.82265 3.82265 3.82265 ZT20-23 7.189265000000001 7.189265000000001 7.189265000000001