condition mean min max ZT0-3 121.326345 121.326345 121.326345 ZT4-7 105.379131 105.379131 105.379131 ZT8-11 118.246979 118.246979 118.246979 ZT12-15 119.4803015 119.4803015 119.4803015 ZT16-19 165.7851 165.7851 165.7851 ZT20-23 191.025995 191.025995 191.025995