condition mean min max ZT0-3 0.7561226666666666 0.6651515 0.831155 ZT4-7 0.413129 0.413129 0.413129 ZT8-11 0.508804 0.508804 0.508804 ZT12-15 0.7567349999999999 0.6674599999999999 0.84601 ZT16-19 0.883926 0.883926 0.883926 ZT20-23 0.632477 0.632477 0.632477