condition mean min max ZT0-3 0.523413 0.523413 0.523413 ZT4-7 0.3274765 0.3274765 0.3274765 ZT8-11 0.4939435 0.4939435 0.4939435 ZT12-15 0.550997 0.550997 0.550997 ZT16-19 0.5301184999999999 0.5301184999999999 0.5301184999999999 ZT20-23 0.2343475 0.2343475 0.2343475