Help me find which A,B,C, or D is the correct answer to the last part please. The brain volumes ​(cm3​) of 50 brains vary from a low of 904 cm3 to a high of 1490 cm3. Use the range rule of thumb to estimate the standard deviation s and compare the result to the exact standard deviation of 191.4 cm3​, assuming the estimate is accurate if it is within 15 cm3. The estimated standard deviation is 146.5 cm3.     A. The approximation is not accurate because the error of the range rule of​ thumb's approximation is greater than 15 cm3.   B. The approximation is not accurate because the error of the range rule of​ thumb's approximation is less than 15 cm3.   C. The approximation is accurate because the error of the range rule of​ thumb's approximation is greater than 15 cm3.   D. The approximation is accurate because the error of the range rule of​ thumb's approximation is less than 15 cm3.

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Author:Amos Gilat
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Help me find which A,B,C, or D is the correct answer to the last part please.
The brain volumes
​(cm3​)
of 50 brains vary from a low of
904
cm3
to a high of
1490
cm3.
Use the range rule of thumb to estimate the standard deviation s and compare the result to the exact standard deviation of
191.4
cm3​,
assuming the estimate is accurate if it is within 15
cm3.
The estimated standard deviation is
146.5
cm3.
 
 
A.
The approximation
is not
accurate because the error of the range rule of​ thumb's approximation is
greater
than 15
cm3.
 
B.
The approximation
is not
accurate because the error of the range rule of​ thumb's approximation is
less
than 15
cm3.
 
C.
The approximation
is
accurate because the error of the range rule of​ thumb's approximation is
greater
than 15
cm3.
 
D.
The approximation
is
accurate because the error of the range rule of​ thumb's approximation is
less
than 15
cm3.
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