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The brain volumes (cm) of 20 brains have a mean of 1064.3 cm and a standard deviation of 125.6 cm. Use the given standard deviation

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The brain volumes (cm") of 20 brains have a mean of 1064.3 cm" and a standard deviation of 125.6 cm". Use the given standard deviation and the range rule of thumb to identify the limits separating values that are significantly low or significantly high. For such data, would a brain volume of 1335.5 cm" be significantly high

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