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Variável categórica de regressão linear R valor "oculto"
Este é apenas um exemplo que encontrei várias vezes, portanto não tenho dados de amostra. Executando um modelo de regressão linear em R: a.lm = lm(Y ~ x1 + x2) x1é uma variável contínua. x2é categórico e possui três valores, por exemplo, "Baixo", "Médio" e "Alto". No entanto, a saída …
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