condition mean min max ZT0-3 10.736647907000002 8.364741352000001 13.108554462 ZT4-7 13.3425145825 12.9461029 13.738926265 ZT8-11 16.887647287500002 12.533420135 21.24187444 ZT12-15 16.25043359725 15.513863474499999 16.98700372 ZT16-19 10.88400874225 10.3138316195 11.454185865000001 ZT20-23 11.621823748250002 9.9520217445 13.291625752000002