condition mean min max ZT0-3 145.866254 145.866254 145.866254 ZT4-7 164.5026965 164.5026965 164.5026965 ZT8-11 199.26406 199.26406 199.26406 ZT12-15 177.1956145 177.1956145 177.1956145 ZT16-19 228.159821 228.159821 228.159821 ZT20-23 208.667795 208.667795 208.667795