document.write( "Question 969798: 1.The math grades on the final exam varied greatly. Using the scores below, how many scores were within one standard deviation of the mean? How many scores were within two standard deviations of the mean?
\n" ); document.write( " 99 34 86 57 73 85 91 93 46 96 88 79 68 85 89\r
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Algebra.Com's Answer #592543 by Edwin McCravy(20065)\"\" \"About 
You can put this solution on YOUR website!
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document.write( "Go to this site:\r\n" );
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document.write( "http://www.calculator.net/standard-deviation-calculator.html\r\n" );
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document.write( "Type in your values with commas between them like this:\r\n" );
document.write( "99,34,86,57,73,85,91,93,46,96,88,79,68,85,89\r\n" );
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document.write( "Click on \"Calculate\":\r\n" );
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document.write( "Read these two values:\r\n" );
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document.write( "Mean (Average):	77.933333333333\r\n" );
document.write( "Population Standard Deviation, 18.382842241854\r\n" );
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\n" ); document.write( "how many scores were within one standard deviation of the mean?
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document.write( "Add 1 times the standard deviation 18.382842241854 to the mean\r\n" );
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document.write( "77.933333333333 + 1x18.382842241854 = 96.316175575187\r\n" );
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document.write( "Subtract 1 times the standard deviation 18.382842241854 from the mean\r\n" );
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document.write( "77.933333333333 - 1x18.382842241854 = 59.550491091479\r\n" );
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document.write( "List the scores that are between those two numbers:\r\n" );
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document.write( "86,73,85,91,93,96,88,79,68,85,89\r\n" );
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document.write( "Count them:\r\n" );
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document.write( "Answer 11.\r\n" );
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document.write( "

\n" ); document.write( "how many scores were within two standard deviations of the mean?
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document.write( "Add 2 times the standard deviation 18.382842241854 to the mean\r\n" );
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document.write( "77.933333333333 + 2x18.382842241854 = (you do it)\r\n" );
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document.write( "Subtract 2 times the standard deviation 18.382842241854 from the mean\r\n" );
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document.write( "77.933333333333 - 2x18.382842241854 = (you do it)\r\n" );
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document.write( "List the scores between those two numbers:\r\n" );
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document.write( "(you do it)\r\n" );
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document.write( "Count them:\r\n" );
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document.write( "(you do it).\r\n" );
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document.write( "Edwin

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