condition mean min max ZT0-3 59.607643767499994 52.455917535 66.75936999999999 ZT4-7 13.898406612999999 10.7753808385 17.0214323875 ZT8-11 14.177047023 9.999027808 18.355066238 ZT12-15 19.69256634 18.34516416 21.039968520000002 ZT16-19 21.761973875 18.211820085 25.312127665 ZT20-23 44.2286262675 38.855678714999996 49.60157382