condition mean min max ZT0-3 0.8045895 0.716448 0.8927309999999999 ZT4-7 0.3920915 0.3920915 0.3920915 ZT8-11 0.5027445 0.5027445 0.5027445 ZT12-15 0 0 0 ZT16-19 1.152557 1.152557 1.152557 ZT20-23 0.8821475 0.8821475 0.8821475