condition mean min max ZT0-3 16.2702 16.2702 16.2702 ZT4-7 13.6626 13.6626 13.6626 ZT8-11 10.001005 10.001005 10.001005 ZT12-15 14.6463 14.6463 14.6463 ZT16-19 13.577 13.577 13.577 ZT20-23 16.210900000000002 16.210900000000002 16.210900000000002