condition mean min max ZT0-3 0.1482525 0.112936 0.2179335 ZT4-7 0.161884 0.161884 0.161884 ZT8-11 0.111908 0.111908 0.111908 ZT12-15 0.9319024999999999 0.7985399999999999 1.065265 ZT16-19 0.695363 0.695363 0.695363 ZT20-23 0.664177 0.664177 0.664177