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Question 3 4 pts (7) Suppose that, on average, electricians earn approximately u = $54,000 per year in the United States. Assume that the distribution

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Question 3 4 pts (7) Suppose that, on average, electricians earn approximately u = $54,000 per year in the United States. Assume that the distribution for electricians' yearly earnings is normally distributed and that the standard deviation is o = $12,000. (ch 7) Given a sample of four electricians, what is the standard deviation for the sampling distribution of the sample mean? 12,000 54,000 6,000 36,000

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