Question

why cannot simple regression be used to test the significance of the difference among 3 or means ?

Answer 1

t-tests and ANOVAs involve the use of categorical predictors, while linear regression involves the use of continuous predictors. ... When comparing between 2 groups, there are 2 parameters in the regression model that need to be estimated: b0 and b1,therfore simple regression cannot be used to test the significance of the difference 3 or means ,test the significance;significance test uses data to evaluate a hypothesis by comparing sample point estimates of parameters to values predicted by the hypothesis.