condition mean min max ZT0-3 345.534109 345.534109 345.534109 ZT4-7 181.7598355 181.7598355 181.7598355 ZT8-11 182.8376145 182.8376145 182.8376145 ZT12-15 208.9023155 208.9023155 208.9023155 ZT16-19 349.5684475 349.5684475 349.5684475 ZT20-23 405.8303535 405.8303535 405.8303535