condition mean min max ZT0-3 743.36853905 423.0305901 1063.706488 ZT4-7 164.062998775 146.711405 181.41459255 ZT8-11 128.50962504 102.71709172999999 154.30215835 ZT12-15 41.1915623625 40.106002645000004 42.27712208 ZT16-19 78.8062975325 71.831202765 85.7813923 ZT20-23 133.6653645325 115.112626415 152.21810265