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The brain volumes (c * m ^ 3) of 50 brains vary from a low of 914c * m ^ 3 to a high of

The brain volumes (c * m ^ 3) of 50 brains vary from a low of 914c * m ^ 3 to a high of 1482c * m ^ 3 Use the range rule of thumb to estimate the standard deviation s and compare the result to the exact standard deviation of 197.1 c * m ^ 3 assuming the estimate is accurate if it is within 15c * m ^ 3

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