document.write( "Question 1171132: The scores of 9 job applicants in a 15-item Math exam are as follows: 6, 12, 15, 9, 10, 9, 8, 7, 6. Calculate the mean, range, variance and standard deviation.
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Algebra.Com's Answer #796050 by Boreal(15235)\"\" \"About 
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add them up (82), divide by the number (9) and get 9.111 as mean
\n" ); document.write( "range is high-low or 15-6=9
\n" ); document.write( "variance is 7.65
\n" ); document.write( "sd is 2.77 Note, I treated this as a population. If treated as a sample the sd is 2.93 and the variance 8.58
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