document.write( "Question 188631This question is from textbook a survey of mathematics with applications
\n" ); document.write( ": 24) Seven employees at a large company were asked the number of addtional years they planned to work before retirement. their response was 10,23,28,4,1,6,12 \r
\n" ); document.write( "\n" ); document.write( "A) detrimine the standard deviation. \r
\n" ); document.write( "\n" ); document.write( "26) the amount of money that 7 people spent on perscription medication in a year are as follows: $600,$100,$850,$350,$250,$140,$300.\r
\n" ); document.write( "\n" ); document.write( "A)detrmine the range
\n" ); document.write( "B)determine the standard deviation \n" ); document.write( "
Algebra.Com's Answer #141478 by Edwin McCravy(20060)\"\" \"About 
You can put this solution on YOUR website!
10,23,28,4,1,6,12\r
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document.write( " 1. List the numbers under X.\r\n" );
document.write( " 2. Add them, getting 84.\r\n" );
document.write( " 3. Count them, there are 7\r\n" );
document.write( " 4. Divide 84 by 7, getting 12.  \r\n" );
document.write( "    That's x, the mean.\r\n" );
document.write( " 5. Subtract 12 from each number,_ \r\n" );
document.write( "    place it under the heading X-X\r\n" );
document.write( " 6. Square each number under the heading\r\n" );
document.write( "    X-X and put it under\r\n" );
document.write( "    the heading (X-X)2         _  \r\n" );
document.write( " 7. Add those numbers under (X-X)2 \r\n" );
document.write( " 8. Divide by 1 less that the number of numbers, that is,\r\n" );
document.write( "    there are 7 numbers so divide by 1 less\r\n" );
document.write( "    or 6, getting 100.3333333, that's called the \"variance\", s2 \r\n" );
document.write( " 9. Take the square root of 100.3333333, getting s = 10.0166528\r\n" );
document.write( "10. The range is the largest number minus the smallest number, 28-1 or 27.\r\n" );
document.write( "        _      _    _ \r\n" );
document.write( "   X -  X =  X-X (X-X)2  \r\n" );
document.write( "------------------------\r\n" );
document.write( "  10 - 12 =  -2     4\r\n" );
document.write( "  23 - 12 =  11   121\r\n" );
document.write( "  28 - 12 =  16   256\r\n" );
document.write( "   4 - 12 =  -8    64\r\n" );
document.write( "   1 - 12 = -11   121\r\n" );
document.write( "   6 - 12 =  -6    36\r\n" );
document.write( "  12 - 12 =   0     0\r\n" );
document.write( " ---             ----\r\n" );
document.write( "7)84           6) 602\r\n" );
document.write( " ---   _         ----\r\n" );
document.write( "  12 = X          100.3333333 = s2\r\n" );
document.write( "                  ___________\r\n" );
document.write( "                 Ö100.3333333 = 10.0166528 = s\r\n" );
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document.write( "The largest value is 28 and the smallest value is 1, so the\r\n" );
document.write( "range is 28-1 or 27.\r\n" );
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document.write( "Your other problem is done the same way.\r\n" );
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document.write( "The mean is $370\r\n" );
document.write( "The standard deviation is $267.3325021\r\n" );
document.write( "The range is $850-$100 = $750\r\n" );
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document.write( "Edwin
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