condition mean min max ZT0-3 7490.700000000001 7490.700000000001 7490.700000000001 ZT4-7 5440.4 5440.4 5440.4 ZT8-11 5738.1 5738.1 5738.1 ZT12-15 5318.6 5318.6 5318.6 ZT16-19 6239.200000000001 6239.200000000001 6239.200000000001 ZT20-23 7348.65 7348.65 7348.65