document.write( "Question 444994: The KSW computer science aptitude test was given to 50 students. The following frequency distribution resulted from their scores:
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\n" ); document.write( "The data value 12 belongs to which class?
\n" ); document.write( "What is the class width?
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Algebra.Com's Answer #306646 by AnlytcPhil(1807) $\"\"$ $\"About$

You can put this solution on YOUR website!

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document.write( "The KSW computer science aptitude test was given to 50 students.  \r\n" );
document.write( "The following frequency distribution resulted from their scores:\r\n" );
document.write( "KSW Test Scores 0-4 4-8 8-12 12-16 16-20 20-24 24-28\r\n" );
document.write( "Frequency        4   8   8    20     6     3     1\r\n" );
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document.write( "The data value 12 belongs to which class?  \r\n" );
document.write( "What is the class width?   \r\n" );
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document.write( "The highest value possible is 28\r\n" );
document.write( "The lowest value possible is 0\r\n" );
document.write( "Subtract 28 - 0 = 28\r\n" );
document.write( "Divide by 7 \r\n" );
document.write( "Get 4\r\n" );
document.write( "Round up to the next higher whole number, which is 5\r\n" );
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document.write( "So the class width is 5\r\n" );
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document.write( "Start by subtracting .5 from the least possible value,\r\n" );
document.write( "0 - .5 = -.5\r\n" );
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document.write( "Starting with -.5 \r\n" );
document.write( "add 5 to that, get 4.5\r\n" );
document.write( "add 5 to that, get 9.5\r\n" );
document.write( "add 5 to that, get 14.5\r\n" );
document.write( "add 5 to that, get 19.5\r\n" );
document.write( "add 5 to that, get 24.4\r\n" );
document.write( "add 5 to that, get 29.5\r\n" );
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document.write( "So there are only 6 classes because\r\n" );
document.write( "we did not need a 7th class since 28\r\n" );
document.write( "is the largest possible score.\r\n" );
document.write( "The 6 classes are:\r\n" );
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document.write( "-0.5 --  4.5\r\n" );
document.write( " 4.5 --  9.5\r\n" );
document.write( " 9.5 -- 14.5\r\n" );
document.write( "14.5 -- 19.5\r\n" );
document.write( "19.5 -- 24.5\r\n" );
document.write( "24.5 -- 29.5\r\n" );
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document.write( "This way, no score lies on the boundary between\r\n" );
document.write( "any two classes, because the scores are all whole\r\n" );
document.write( "numbers, and the boundaries between the classes are\r\n" );
document.write( "not whole numbers.\r\n" );
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document.write( "We can now easily see that 12 belongs to the class\r\n" );
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document.write( " 9.5 -- 14.5\r\n" );
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document.write( "Edwin \n" );
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