condition mean min max ZT0-3 860.05 860.05 860.05 ZT4-7 821.9 821.9 821.9 ZT8-11 865.0999999999999 865.0999999999999 865.0999999999999 ZT12-15 691.95 691.95 691.95 ZT16-19 802.0999999999999 802.0999999999999 802.0999999999999 ZT20-23 996.2 996.2 996.2