condition mean min max ZT0-3 0.3626785 0.3626785 0.3626785 ZT4-7 0.2298325 0.2298325 0.2298325 ZT8-11 0.218647 0.218647 0.218647 ZT12-15 0.2655715 0.2655715 0.2655715 ZT16-19 0.099775 0.099775 0.099775 ZT20-23 0.39823949999999997 0.39823949999999997 0.39823949999999997