document.write( "Question 892769: Please help me solve this the distribution of the number of erros 10 students made on a typing test is shown.
\n" ); document.write( "Errors Frequency
\n" ); document.write( "0-2 1
\n" ); document.write( "3-5 3
\n" ); document.write( "6-8 4
\n" ); document.write( "9-11 1
\n" ); document.write( "12-14 1 \n" ); document.write( "
Algebra.Com's Answer #541000 by stanbon(75887)\"\" \"About 
You can put this solution on YOUR website!
Please help me solve this the distribution of the number of erros 10 students made on a typing test is shown.
\n" ); document.write( "Errors Frequency
\n" ); document.write( "0-2 1
\n" ); document.write( " 3-5 3
\n" ); document.write( " 6-8 4
\n" ); document.write( " 9-11 1
\n" ); document.write( " 12-14 1
\n" ); document.write( "-----
\n" ); document.write( "I'll work out the mean. You can work out the standard deviation.
\n" ); document.write( "Note:: Use the mark of each interval to represent the interval value.
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\n" ); document.write( "mean = (1*1 + 3*4 + 4*7 + 1*10 + 1*13)/(1+3+4+1+1)
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\n" ); document.write( "= (1 + 12 + 28 + 10 + 13)/(10)
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\n" ); document.write( "= 64/10
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\n" ); document.write( "= 6.4
\n" ); document.write( "--------
\n" ); document.write( "Note:: The answer you should get for the sample standard deviation is 3.41
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
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