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O Histograma em que o valor médio está no meio da faixa dos dados, a frequência é mais alta no meio e torna-se gradualmente mais baixa na direção dos extremos é o:

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Questionário

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Consulta a anuários e revistas

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Observação

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Há diversos métodos para coletar dados primários citados, abaixo, exceto:

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A série estatística representada é:

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Comentários