condition mean min max ZT0-3 31.00241 31.00241 31.00241 ZT4-7 44.5532035 44.5532035 44.5532035 ZT8-11 40.454513000000006 40.454513000000006 40.454513000000006 ZT12-15 47.325285 47.325285 47.325285 ZT16-19 55.1009215 55.1009215 55.1009215 ZT20-23 52.7886635 52.7886635 52.7886635