condition mean min max ZT0-3 54.67700000000001 54.67700000000001 54.67700000000001 ZT4-7 55.15075 55.15075 55.15075 ZT8-11 47.402249999999995 47.402249999999995 47.402249999999995 ZT12-15 35.57355 35.57355 35.57355 ZT16-19 49.947050000000004 49.947050000000004 49.947050000000004 ZT20-23 47.31075 47.31075 47.31075