condition mean min max ZT0-3 56.706 56.706 56.706 ZT4-7 24.77145 24.77145 24.77145 ZT8-11 60.8038 60.8038 60.8038 ZT12-15 106.80199999999999 106.80199999999999 106.80199999999999 ZT16-19 181.31150000000002 181.31150000000002 181.31150000000002 ZT20-23 69.82025 69.82025 69.82025