condition mean min max ZT0-3 69.4912034 66.56414769 72.41825911000001 ZT4-7 62.726003113333334 57.270954223333334 68.18105200333333 ZT8-11 59.64898538166666 57.24353850333333 62.05443226 ZT12-15 66.49328229166667 62.514309960000006 70.47225462333333 ZT16-19 93.970138325 92.54363187999999 95.39664477 ZT20-23 88.30554456499999 81.88948207333333 94.72160705666667