condition mean min max ZT0-3 67.1230992975 65.944094845 68.30210375 ZT4-7 82.95853277166667 82.12274015 83.79432539333334 ZT8-11 82.15872352666668 80.29752761 84.01991944333334 ZT12-15 74.17670921 72.83692554 75.51649288 ZT16-19 83.46642954166666 82.66911422333332 84.26374486 ZT20-23 87.39190041 78.36923228666667 96.41456853333334