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The brain volumes (cm) of 20 brains have a mean of 1076.3 cm and a standard deviation of 126.6 cm. Use the given standard

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The brain volumes (cm) of 20 brains have a mean of 1076.3 cm and a standard deviation of 126.6 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 1299.5 cm be significantly high? 3

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