condition mean min max ZT0-3 70.89102655333332 65.79066139666666 75.99139170999999 ZT4-7 58.462294975000006 52.88036306 64.04422689 ZT8-11 81.525841665 73.9131181 89.13856523 ZT12-15 43.77923017 35.57117721333333 51.98728312666667 ZT16-19 43.337431376666665 43.21975104 43.45511171333333 ZT20-23 26.958093628333337 24.26400273666667 29.652184520000002