condition mean min max ZT0-3 52.4589 48.29425 56.62355 ZT4-7 79.72495 79.72495 79.72495 ZT8-11 75.06455 75.06455 75.06455 ZT12-15 0 0 0 ZT16-19 75.59885 75.59885 75.59885 ZT20-23 66.22675 66.22675 66.22675