condition mean min max ZT0-3 67.65602669083333 66.38943162666666 68.922621755 ZT4-7 68.40305900499999 67.96656763 68.83955037999999 ZT8-11 70.91518152833333 70.59273462 71.23762843666667 ZT12-15 73.625314305 60.51742662 86.73320199 ZT16-19 81.17964843333334 78.28648705333333 84.07280981333334 ZT20-23 74.30980088166666 71.02168116333334 77.5979206