condition mean min max ZT0-3 0.5508029999999999 0.5508029999999999 0.5508029999999999 ZT4-7 0.473893 0.473893 0.473893 ZT8-11 0.669185 0.669185 0.669185 ZT12-15 0.625877 0.625877 0.625877 ZT16-19 1.32395 1.32395 1.32395 ZT20-23 0.7377184999999999 0.7377184999999999 0.7377184999999999