condition mean min max ZT0-3 71.319203 66.79992915333334 75.83847684666667 ZT4-7 98.65753264166668 88.94738102666668 108.36768425666666 ZT8-11 92.55681786333334 91.62345101 93.49018471666668 ZT12-15 81.587070395 78.30531213 84.86882865999999 ZT16-19 99.553948715 88.91492439000001 110.19297304 ZT20-23 97.51586646666667 92.71823343 102.31349950333333