condition mean min max ZT0-3 712.342332 712.342332 712.342332 ZT4-7 896.6260125 896.6260125 896.6260125 ZT8-11 471.887976 471.887976 471.887976 ZT12-15 345.7120885 345.7120885 345.7120885 ZT16-19 141.48603649999998 141.48603649999998 141.48603649999998 ZT20-23 153.154831 153.154831 153.154831