condition mean min max ZT0-3 90.65528696083334 84.14504961666667 97.16552430499999 ZT4-7 73.78883954 63.05391846333334 84.52376061666666 ZT8-11 55.963374349999995 53.75124511 58.17550359 ZT12-15 63.08892149166667 62.20440953 63.973433453333335 ZT16-19 64.1332353 60.4801321 67.7863385 ZT20-23 63.07897088166666 60.105953389999996 66.05198837333333