condition mean min max ZT0-3 74.836175 69.41075000000001 80.2616 ZT4-7 60.002449999999996 60.002449999999996 60.002449999999996 ZT8-11 48.176950000000005 48.176950000000005 48.176950000000005 ZT12-15 0 0 0 ZT16-19 73.27925 73.27925 73.27925 ZT20-23 79.01185000000001 79.01185000000001 79.01185000000001