what can we use regression to prove necessary sufficiency when is sufficiency and necessity necessary why regression is needed in sociology why are regression tests important how to tell whether a condition is necessary or sufficient is regression necessary when is x necessary why use regression to demonstrate sufficient why does the term necessity and sufficiency mean the same thing? why is it necessary to study sufficiency in a regression? what does it mean when a statistic is needed and sufficient if necessary what is sufficient interpreting necessary versus sufficient why do we use regression as evidence for necessity which condition is necessary in regression how does regression prove that something is necessary if x factor is a necessary condition condition for y, the difference between the two is why use regression in social sciences which term refers to the relationship between necessity and sufficiency? how can you prove necessity or sufficiency by regression