condition mean min max ZT0-3 29.791 29.791 29.791 ZT4-7 19.25495 19.25495 19.25495 ZT8-11 17.264650000000003 17.264650000000003 17.264650000000003 ZT12-15 25.744500000000002 25.744500000000002 25.744500000000002 ZT16-19 27.22485 27.22485 27.22485 ZT20-23 32.19505 32.19505 32.19505