condition mean min max ZT0-3 26.161151314999998 25.67434299 26.64795964 ZT4-7 41.758765485 34.9910211 48.52650987 ZT8-11 74.02575113 58.415893175 89.635609085 ZT12-15 54.3931356 42.040637114999996 66.745634085 ZT16-19 44.329697255 44.07594931 44.5834452 ZT20-23 49.312498025 49.200100725 49.424895325