condition mean min max ZT0-3 58.332142 58.332142 58.332142 ZT4-7 93.2709035 93.2709035 93.2709035 ZT8-11 83.5454545 83.5454545 83.5454545 ZT12-15 87.4579455 87.4579455 87.4579455 ZT16-19 82.3410715 82.3410715 82.3410715 ZT20-23 58.104584 58.104584 58.104584