document.write( "Question 319310: Can you explain \"variance\"? \n" ); document.write( "

Algebra.Com's Answer #228651 by Edwin McCravy(20064) $\"\"$ $\"About$

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document.write( "The variance is the average of the squares of all the differences from the mean.\r\n" );
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document.write( "Then the standard deviation is the square root of the variance which is\r\n" );
document.write( "approximately the average difference from the mean.\r\n" );
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document.write( "1 6 7 7 7 6 0 1 0 1 \r\n" );
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document.write( "Their mean is \r\n" );
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document.write( "The average difference from the mean is 3.04 and the standard deviation is 3,\r\n" );
document.write( "so we can say that those 10 numbers average differing from their mean by\r\n" );
document.write( "about 3.  The variance is the square of that or about 9.\r\n" );
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document.write( "Edwin

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