condition mean min max ZT0-3 1689.349274 1689.349274 1689.349274 ZT4-7 1762.5598224999999 1762.5598224999999 1762.5598224999999 ZT8-11 1773.704403 1773.704403 1773.704403 ZT12-15 1233.7295595 1233.7295595 1233.7295595 ZT16-19 2376.182637 2376.182637 2376.182637 ZT20-23 2810.5690585 2810.5690585 2810.5690585