condition mean min max ZT0-3 54.168375 47.4641 60.87264999999999 ZT4-7 65.16095 65.16095 65.16095 ZT8-11 53.459950000000006 53.459950000000006 53.459950000000006 ZT12-15 0 0 0 ZT16-19 78.74215 78.74215 78.74215 ZT20-23 79.69925 79.69925 79.69925