condition mean min max ZT0-3 92.73969801333334 87.09529452666666 98.3841015 ZT4-7 96.751680665 96.34545444999999 97.15790688 ZT8-11 95.99576131500001 89.68156560333334 102.30995702666667 ZT12-15 85.45999812833332 83.80871521 87.11128104666666 ZT16-19 75.64210406333333 74.91056175 76.37364637666667 ZT20-23 70.18428229333334 68.64910623 71.71945835666668