condition mean min max ZT0-3 37.01722 37.01722 37.01722 ZT4-7 54.346907 54.346907 54.346907 ZT8-11 79.0236395 79.0236395 79.0236395 ZT12-15 72.5983945 72.5983945 72.5983945 ZT16-19 47.9292185 47.9292185 47.9292185 ZT20-23 30.808614499999997 30.808614499999997 30.808614499999997