condition mean min max ZT0-3 0.0616725 0.0 0.123345 ZT4-7 0.1887925 0.1887925 0.1887925 ZT8-11 0.312422 0.312422 0.312422 ZT12-15 0 0 0 ZT16-19 0.061562 0.061562 0.061562 ZT20-23 0.6169845 0.6169845 0.6169845