condition mean min max ZT0-3 0.8492685 0.8492685 0.8492685 ZT4-7 0.742638 0.742638 0.742638 ZT8-11 0.2548485 0.2548485 0.2548485 ZT12-15 0.487444 0.487444 0.487444 ZT16-19 0.446948 0.446948 0.446948 ZT20-23 0.7399805 0.7399805 0.7399805