condition mean min max ZT0-3 190.4588756 161.562046 219.3557052 ZT4-7 82.311858645 65.23457253000001 99.38914476000001 ZT8-11 26.379591465166666 12.426377847 40.332805083333334 ZT12-15 10.039056161333335 7.497889854 12.580222468666667 ZT16-19 24.915202460499998 14.861525301 34.968879619999996 ZT20-23 156.7336283 88.05739059999999 225.409866