condition mean min max ZT0-3 41.901025000000004 39.132000000000005 44.67005 ZT4-7 47.5787 47.5787 47.5787 ZT8-11 49.63145 49.63145 49.63145 ZT12-15 0 0 0 ZT16-19 61.9945 61.9945 61.9945 ZT20-23 74.0963 74.0963 74.0963