condition mean min max ZT0-3 11.045202499999998 5.495405 16.595 ZT4-7 1.572538 1.572538 1.572538 ZT8-11 0.4686855 0.4686855 0.4686855 ZT12-15 0 0 0 ZT16-19 7.920525 7.920525 7.920525 ZT20-23 10.629255 10.629255 10.629255