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The brain volumes (cm) of 20 brains have a mean of 1083.9 cm and a standard deviation of 124.5 cm*. Use the given standard deviation

The brain volumes (cm") of 20 brains have a mean of 1083.9 cm and a standard deviation of 124.5 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 1312.9 cm% be significantly high?

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