condition mean min max ZT0-3 0.06139 0.0613265 0.0614535 ZT4-7 0.062464 0.062464 0.062464 ZT8-11 0.0 0.0 0.0 ZT12-15 0 0 0 ZT16-19 0.0 0.0 0.0 ZT20-23 0.42574999999999996 0.42574999999999996 0.42574999999999996