condition mean min max ZT0-3 54.92832705833334 49.10499636 60.75165775666667 ZT4-7 65.821825375 65.4270579 66.21659285 ZT8-11 60.935481896666666 58.62428089666667 63.24668289666666 ZT12-15 47.08148787 45.63149805 48.531477689999996 ZT16-19 43.95131580666666 41.93033284 45.97229877333333 ZT20-23 51.432729020000004 48.94106776 53.924390280000004