condition mean min max ZT0-3 5086.017687 5086.017687 5086.017687 ZT4-7 5508.053110000001 5508.053110000001 5508.053110000001 ZT8-11 6665.973243 6665.973243 6665.973243 ZT12-15 6579.121118 6579.121118 6579.121118 ZT16-19 5661.0513695 5661.0513695 5661.0513695 ZT20-23 5962.453702000001 5962.453702000001 5962.453702000001