Only when all three of the hat matrix elements hᵢ, the Studentized deleted residuals tᵢ and the Cook's distance statistic Dᵢ reveal consistent result should an observation be removed from the regression analysis.

Question

Quizplus · Accepted Answer

When all three elements, hᵢ, tᵢ, and Dᵢ, consistently indicate that an observation should be removed, it is safer to do so in order to avoid biased results.

Only When All Three of the Hat Matrix Elements Hᵢ