condition mean min max ZT0-3 0.902621 0.655114 1.150128 ZT4-7 0.7721735 0.7721735 0.7721735 ZT8-11 0.7006335 0.7006335 0.7006335 ZT12-15 0 0 0 ZT16-19 1.096433 1.096433 1.096433 ZT20-23 0.7915939999999999 0.7915939999999999 0.7915939999999999