condition mean min max ZT0-3 109.614716 109.614716 109.614716 ZT4-7 79.6488725 79.6488725 79.6488725 ZT8-11 110.108691 110.108691 110.108691 ZT12-15 131.08739300000002 131.08739300000002 131.08739300000002 ZT16-19 139.092379 139.092379 139.092379 ZT20-23 122.0639075 122.0639075 122.0639075