condition mean min max ZT0-3 93.746551 93.746551 93.746551 ZT4-7 100.479622 100.479622 100.479622 ZT8-11 98.16719 98.16719 98.16719 ZT12-15 87.8523715 87.8523715 87.8523715 ZT16-19 77.31817 77.31817 77.31817 ZT20-23 84.2684 84.2684 84.2684