condition mean min max ZT0-3 26.495371142499998 21.52254362 31.468198665 ZT4-7 36.71597428 34.292805215 39.139143345 ZT8-11 43.6625601675 34.50022138 52.824898954999995 ZT12-15 71.84171391749999 68.44928695499999 75.23414087999998 ZT16-19 71.4494016175 67.88130684 75.017496395 ZT20-23 60.13420669 57.973499385 62.294913995