condition mean min max ZT0-3 1.4577200000000001 1.3458 1.5696400000000001 ZT4-7 1.45004 1.45004 1.45004 ZT8-11 2.8501250000000002 2.8501250000000002 2.8501250000000002 ZT12-15 0 0 0 ZT16-19 3.38122 3.38122 3.38122 ZT20-23 2.6087350000000002 2.6087350000000002 2.6087350000000002