condition mean min max ZT0-3 9.467346593750001 8.4582381975 10.47645499 ZT4-7 5.79142871825 5.7830065479999995 5.7998508885 ZT8-11 4.545049519 4.2664188295 4.8236802085 ZT12-15 5.455641569000001 4.4812121715 6.430070966500001 ZT16-19 11.169625957500001 8.96523144 13.374020475000002 ZT20-23 14.669039357499999 12.73222174 16.605856975