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Find the Percentage Using Chebyshev's Theorem

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Chebyshev's Theorem states that for any set of numbers, the fraction that will like within k standard deviations of the mean is at least 1- 1/k^2. Use this theorem to find the least possible percentage (to the nearest tenth of a percent) of all the items lying within 4 standard deviations of the mean.

What percentage of all items lie within 4 standard deviations?

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