condition mean min max ZT0-3 129.267075 129.267075 129.267075 ZT4-7 138.569602 138.569602 138.569602 ZT8-11 207.504522 207.504522 207.504522 ZT12-15 41.1027175 41.1027175 41.1027175 ZT16-19 61.688362 61.688362 61.688362 ZT20-23 104.6593345 104.6593345 104.6593345