condition mean min max ZT0-3 0.522963 0.522963 0.522963 ZT4-7 0.3338895 0.3338895 0.3338895 ZT8-11 0.286126 0.286126 0.286126 ZT12-15 0.28406600000000004 0.28406600000000004 0.28406600000000004 ZT16-19 0.4208955 0.4208955 0.4208955 ZT20-23 0.5510305 0.5510305 0.5510305