The 2011 gross sales of all firms in a large city have a


The 2011 gross sales of all firms in a large city have a mean of $2.3 million and a standard deviation of $0.6 million Using the Chebysev's theorem, find at least what percentage of firms in this city had 2011 gross sales of $1.1 to $3.5 million.

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Basic Statistics: The 2011 gross sales of all firms in a large city have a
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