condition mean min max ZT0-3 0.6924165 0.6287975 0.7560355 ZT4-7 1.6342850000000002 1.6342850000000002 1.6342850000000002 ZT8-11 2.444575 2.444575 2.444575 ZT12-15 0 0 0 ZT16-19 1.613875 1.613875 1.613875 ZT20-23 1.209231 1.209231 1.209231