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The leverage-residual plot (L–R plot) is a graphical display of the leverage and residual values for each case in a regression which facilitates the examination of the relative influences of cases under different influence measures. This plot is also useful in attributing the cause of high influence in a case to its leverage, its residual, or their combined effect. The ability to analyze and compare the various single-case influence measures is a by-product of the L-R plot.
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J. Brian Gray (1986) studied this question.
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