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14.1. RESPONSE TRANSFORMATION                                     313






                             -50   95%



                             -100
                        log-Likelihood  -150






                             -200




                                -2           -1           0            1            2

                                                          λ























                      R automatically plots the log-Likelihood as a function of possible    values. It in-
                      dicates both the value that maximizes the log-likelihood, as well as a confidence
                      interval for the    value that maximizes the log-likelihood.









                      boxcox(savings_model, plotit = TRUE, lambda = seq(0.5, 1.5, by = 0.1))
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