That the errors be identically and independently distributed Necessary only for hypothesis tests to be valid,Įstimation of the coefficients only requires Normality – the errors should be normally distributed – technically normality is.Linearity – the relationships between the predictors and the outcome variable should be.This chapter will explore how you can use Stata to check on how well yourĭata meet the assumptions of OLS regression. Without verifying that your data have met the assumptions underlying OLS regression, your results mayīe misleading. In the previous chapter, we learned how to do ordinary linear regression with Stata,Ĭoncluding with methods for examining the distribution of our variables.
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