condition mean min max ZT0-3 85.91855515833333 80.21998697 91.61712334666666 ZT4-7 81.73032973666668 78.92023474333334 84.54042473 ZT8-11 86.46504480333334 84.78002843666667 88.15006117 ZT12-15 82.77521304833334 82.74333057333332 82.80709552333334 ZT16-19 79.92216345166666 77.20915026 82.63517664333332 ZT20-23 65.88287868500001 65.21400259 66.55175478