condition mean min max ZT0-3 0.260883 0.23112349999999998 0.2906425 ZT4-7 0.439315 0.439315 0.439315 ZT8-11 0.9034979999999999 0.9034979999999999 0.9034979999999999 ZT12-15 0 0 0 ZT16-19 0.7225355 0.7225355 0.7225355 ZT20-23 0.4145515 0.4145515 0.4145515