condition mean min max ZT0-3 131.6147101075 124.25130551499998 138.9781147 ZT4-7 73.04909019 67.08549402 79.01268636 ZT8-11 63.32520379499999 62.618669155 64.031738435 ZT12-15 35.964207065 29.75665443 42.171759699999996 ZT16-19 48.1319648475 40.72443007 55.539499625 ZT20-23 73.701786715 69.08074311 78.32283032