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An r companion to applied regression is a broad introduction to the r statistical computing environment in the context of applied regression analysis john fox and sanford weisberg provide a step by step guide to using the free statistical software r . Not all proportions or counts are appropriate for logistic regression analysis note that in each of these specifications both the number of successes and the number of failures is known you should not perform logistic regression on proportion data where you dont know or dont tell r how many individuals went into those proportions. An r companion to applied regression second edition sage 2 null for the bonferonni adjusted outlier test is the observation is an outlier here observation related to medicaltechnicians is an outlier high leverage hat points graph next page librarycar. Coefficients applied to the regression object constructed by lm returns a vector with just estimated values if applied to a summary of the regression coefficients returns a matrix of values that includes estimates standard errors t statistics and p values