condition mean min max ZT0-3 48.70263542 44.78723354 52.6180373 ZT4-7 35.26751464749999 29.900344824999998 40.634684469999996 ZT8-11 54.92208289999999 45.79489519 64.04927061 ZT12-15 45.000532802500004 34.85953593 55.141529675 ZT16-19 25.076966329999998 23.715494885 26.438437775 ZT20-23 39.039290352500004 35.183233075000004 42.89534763