condition mean min max ZT0-3 55.14255553916667 42.454270085000005 67.83084099333334 ZT4-7 78.756975945 78.21419269 79.2997592 ZT8-11 72.36246828 69.52759875666666 75.19733780333333 ZT12-15 73.92130656500001 72.36427899333333 75.47833413666667 ZT16-19 80.06542174 75.41579749 84.71504599000001 ZT20-23 67.86064590333334 66.85162717 68.86966463666667