condition mean min max ZT0-3 37.438548 37.438548 37.438548 ZT4-7 129.5024445 129.5024445 129.5024445 ZT8-11 204.96400549999998 204.96400549999998 204.96400549999998 ZT12-15 122.59624199999999 122.59624199999999 122.59624199999999 ZT16-19 75.14245700000001 75.14245700000001 75.14245700000001 ZT20-23 69.924009 69.924009 69.924009