condition mean min max ZT0-3 0.44541775 0.3895425 0.501293 ZT4-7 0.545883 0.545883 0.545883 ZT8-11 0.691732 0.691732 0.691732 ZT12-15 0 0 0 ZT16-19 0.6804365 0.6804365 0.6804365 ZT20-23 0.39111 0.39111 0.39111