condition mean min max ZT0-3 63.4396992275 61.49063926 65.38875919499999 ZT4-7 66.48226454 60.29436913666667 72.67015994333333 ZT8-11 60.61110597833333 58.06721467333333 63.15499728333333 ZT12-15 67.2026958 65.1337045 69.27168710000001 ZT16-19 85.52979986833333 84.90101354666666 86.15858619 ZT20-23 81.97705170666666 79.64490252 84.30920089333333