condition mean min max ZT0-3 127.324958 127.324958 127.324958 ZT4-7 113.6851015 113.6851015 113.6851015 ZT8-11 117.8826905 117.8826905 117.8826905 ZT12-15 140.960582 140.960582 140.960582 ZT16-19 123.353298 123.353298 123.353298 ZT20-23 151.9059005 151.9059005 151.9059005