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I need help with this question please? Suppose that, on average, electricians earn approximately =$56,400 per year in the United States. Assume that the distribution

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Suppose that, on average, electricians earn approximately =$56,400 per year in the United States. Assume that the distribution for electricians' yearly earnings is normally distributed and that the standard deviation is =$11,200. Given a sample of sixteen electricians, what is the standard deviation for the sampling distribution of the sample mean

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