condition mean min max ZT0-3 108.82173 108.82173 108.82173 ZT4-7 136.621473 136.621473 136.621473 ZT8-11 165.389899 165.389899 165.389899 ZT12-15 141.28375999999997 141.28375999999997 141.28375999999997 ZT16-19 128.868813 128.868813 128.868813 ZT20-23 135.09784100000002 135.09784100000002 135.09784100000002