The brain volumes (cm3) of 20 brains have a mean of 1096.5cm3 and a standard deviation of 120.4cm3 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 1367.3cm3 be significantly high?
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The Brain Volumes (cm3) Of 50 Brains Vary From A Low Of 910 Cm3 To A High Of 1492 Cm3. Use The Ange Rule Of Thumb To Estimate The Standard Deviation S And Compare The Result To The Exact Standard Deviation Of 175.3 Cm3, Assuming The Estimate Is Accurate If It Is Within 15 Cm3.
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