condition mean min max ZT0-3 0.975981 0.945062 1.0069 ZT4-7 0.7063535000000001 0.7063535000000001 0.7063535000000001 ZT8-11 0.7808515 0.7808515 0.7808515 ZT12-15 0 0 0 ZT16-19 1.822675 1.822675 1.822675 ZT20-23 1.33425 1.33425 1.33425