The brain volumes ​(cm3​) of 50 brains vary from a low of 902 cm3 to a high of 1478 cm3. Use the range rule of thumb to estimate the standard deviation s and compare the result to the exact standard deviation of 178.8 cm3​, assuming the estimate is accurate if it is within 15

MATLAB: An Introduction with Applications
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Chapter1: Starting With Matlab
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The brain volumes

​(cm3​)

of 50 brains vary from a low of

902
cm3

to a high of

1478
cm3.

Use the range rule of thumb to estimate the standard deviation s and compare the result to the exact standard deviation of

178.8
cm3​,

assuming the estimate is accurate if it is within 15

cm3.
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