document.write( "Question 714866: thank you for looking at this--what is the standard deviation of the following
\n" ); document.write( "sample: 1,5,5,7,9,10,12,13\r
\n" ); document.write( "\n" ); document.write( "i did the following using this formula
\n" ); document.write( "please note that E stands for Greek summation symbol since i don't have it on my keys
\n" ); document.write( "s^2=Ex^2-(Ex)^2/n-1\r
\n" ); document.write( "\n" ); document.write( "Ex^2 is (1)^2+ (5)^2+(5)^2+(7)^2+(9)^2+(10)^2+(12)^2+(13)^2=594\r
\n" ); document.write( "\n" ); document.write( "(Ex)^2 is (1+5+5+7+9+10+12+13)^2/8 which equals 480.5\r
\n" ); document.write( "\n" ); document.write( "following the formula i took 594-480.5/8-1 since this is a sample my variance
\n" ); document.write( "was 2.32 and then square root that and get 1.52\r
\n" ); document.write( "\n" ); document.write( "the answer is 4.030 so i know i am off and i redid it several times
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Algebra.Com's Answer #439018 by lynnlo(4176) $\"\"$ $\"About$

You can put this solution on YOUR website!
you need to re-write your problem
\n" ); document.write( "hold down your alt key at the same time type in 228
\n" ); document.write( "that e sign will come up \n" ); document.write( "

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