condition mean min max ZT0-3 1.038102 0.6476075 1.4285965 ZT4-7 2.43919 2.43919 2.43919 ZT8-11 3.25936 3.25936 3.25936 ZT12-15 0 0 0 ZT16-19 1.9093149999999999 1.9093149999999999 1.9093149999999999 ZT20-23 1.9189349999999998 1.9189349999999998 1.9189349999999998