Help Please! Variance and Standard Deviation problem!

kenpony21

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Sep 10, 2009
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state: % Of White Voters for Obama in 2008

Alabama 10
Arkansas 30
D.C 87
GA 24
KY 36
LA 15
MS 11
SC 27
TN 34
TX 26


Now i have the mean - 30 , and Range - 77 ..................But I just cant get the variance and standard deviation?

It seems like I'm off... I have 434.8 for the variance.... and 20.8 for the standard deviation.... Can somebody help?

Also is this variable positively or negatively skewed ?- I think it would be negative... And are there any discrepant observations or outliners? I can't find this in my book...
 
kenpony21 said:
It seems like I'm off... I have 434.8 for the variance.... and 20.8 for the standard deviation.
How did you arrive at your values?

Please be complete. Thank you! :wink:
 
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