condition mean min max ZT0-3 1.0129415 1.0129415 1.0129415 ZT4-7 0.538114 0.538114 0.538114 ZT8-11 1.74951 1.74951 1.74951 ZT12-15 5.144845 5.144845 5.144845 ZT16-19 4.387585 4.387585 4.387585 ZT20-23 1.91622 1.91622 1.91622