condition mean min max ZT0-3 0.27544175 0.2233995 0.327484 ZT4-7 0.9344334999999999 0.9344334999999999 0.9344334999999999 ZT8-11 0.5021555 0.5021555 0.5021555 ZT12-15 0 0 0 ZT16-19 0.866521 0.866521 0.866521 ZT20-23 0.44790949999999996 0.44790949999999996 0.44790949999999996