why do regression tests give different results why do the associations between x and y change according to levels of factors? why is it important to swap y and x in regression why do regression tests give different results explain why the x-y relationship between a predictor and a response y is different. how does the association between x and y change with g why do regression tests give different results why is it different when your variable change why do x and y in a regression model change according to levels of factor g? what would the association change between predictor x and response y why does the association between predictor x and y change according to coefficients of g? what is the difference between an x and a y regression model why do regression models change as the grouping of factors changes? why do regression tests give different results why do regression models have different associations why are regression tests different? how do you find a difference between y and x in a linear regression? what level do you change x and y in g? why do regression models give different results why do different regression tests give different results?