condition mean min max ZT0-3 10.569625 9.292850000000001 11.8464 ZT4-7 23.735500000000002 23.735500000000002 23.735500000000002 ZT8-11 13.2142 13.2142 13.2142 ZT12-15 0 0 0 ZT16-19 8.84056 8.84056 8.84056 ZT20-23 15.651900000000001 15.651900000000001 15.651900000000001