condition mean min max ZT0-3 0.04011981666666667 0.02438615 0.04853445 ZT4-7 0.09285 0.09285 0.09285 ZT8-11 0.0 0.0 0.0 ZT12-15 0.051902199999999996 0.0255714 0.078233 ZT16-19 0.0227878 0.0227878 0.0227878 ZT20-23 0.0256957 0.0256957 0.0256957