Suppose that the mean firm size in our industry is 170 and that the standard deviation of firm size in our industry is 1

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answerhappygod
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Suppose that the mean firm size in our industry is 170 and that the standard deviation of firm size in our industry is 1

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Suppose that the mean firm size in our industry is 170 and that
the standard deviation of firm size in our industry is 13. We have
a random sample of 290 firms from our industry. Given this sample
size, what is the distribution of the sample mean of firm size in
our industry? (Round to 3 digits after the decimal point.)
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