document.write( "Question 1032849: Use the range rule of thumb to approximate the standard deviation.
\n" ); document.write( "2, 6, 15, 9, 11, 22, 1, 4, 8, 19\r
\n" ); document.write( "\n" ); document.write( "A)2
\n" ); document.write( "B)6.8
\n" ); document.write( "C)5.25
\n" ); document.write( "D)6.3
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Algebra.Com's Answer #647520 by robertb(5830)\"\" \"About 
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C)5.25.\r
\n" ); document.write( "\n" ); document.write( "The range rule of thumb says that the range of a data set is about four times the standard deviation.\r
\n" ); document.write( "\n" ); document.write( "The range is 22 - 1 = 21, thus the standard deviation is around 21/4 = 5.25.
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