condition mean min max ZT0-3 65.502135815 56.636578899999996 74.36769273 ZT4-7 80.439638035 77.23883189 83.64044418 ZT8-11 74.42866503833334 73.13330826333333 75.72402181333334 ZT12-15 80.13377771 80.08280331666667 80.18475210333334 ZT16-19 82.494255135 75.768457 89.22005327000001 ZT20-23 66.69867777333334 64.84127502333334 68.55608052333334