condition mean min max ZT0-3 81.026391855 76.75743022333333 85.29535348666667 ZT4-7 68.96584140833333 64.235343 73.69633981666667 ZT8-11 77.50638015999999 72.58600456 82.42675575999999 ZT12-15 82.97869742500001 82.55704446333333 83.40035038666667 ZT16-19 63.11950156 55.40931466 70.82968846 ZT20-23 67.71316656833334 54.793252896666665 80.63308024