condition mean min max ZT0-3 0.3437699833333333 0.22268150000000003 0.516674 ZT4-7 0.247083 0.247083 0.247083 ZT8-11 0.04244555 0.04244555 0.04244555 ZT12-15 0.48635 0.4358605 0.5368395 ZT16-19 0.6052945000000001 0.6052945000000001 0.6052945000000001 ZT20-23 0.6795249999999999 0.6795249999999999 0.6795249999999999