condition mean min max ZT0-3 0.26498275 0.1750535 0.354912 ZT4-7 0.532951 0.532951 0.532951 ZT8-11 0.443394 0.443394 0.443394 ZT12-15 0 0 0 ZT16-19 0.174739 0.174739 0.174739 ZT20-23 0.351283 0.351283 0.351283