condition mean min max ZT0-3 21.588866666666668 13.990950000000002 33.78725 ZT4-7 60.29575 60.29575 60.29575 ZT8-11 61.269 61.269 61.269 ZT12-15 42.930575 41.0201 44.841049999999996 ZT16-19 28.636650000000003 28.636650000000003 28.636650000000003 ZT20-23 24.781950000000002 24.781950000000002 24.781950000000002