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b. Voce acredita que o fabricante tem direito de declarar que as lampadas apresentam uma media aritme- tica de vida util que corresponde a 400

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b. Voce acredita que o fabricante tem direito de declarar que as lampadas apresentam uma media aritme- tica de vida util que corresponde a 400 horas? Explique. c. Suponha que o desvio-padrao seja alterado para 80 horas. Quais sao suas respostas em a. e b

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