document.write( "Question 394383: The mathematics department at a community college collected data for the number of students enrolled in 40 math courses over the course of one year. The following stem-and-leaf display shows the total number of students enrolled in each class. \r
\n" ); document.write( "\n" ); document.write( " Class Size Totals
\n" ); document.write( " 12|667
\n" ); document.write( " 11|89
\n" ); document.write( " 10|0257
\n" ); document.write( " 9|1357
\n" ); document.write( " 8|00377
\n" ); document.write( " 7|257
\n" ); document.write( " 6|22359
\n" ); document.write( " 5|3389
\n" ); document.write( " 4|23366
\n" ); document.write( " 3|66789\r
\n" ); document.write( "\n" ); document.write( " Key:
\n" ); document.write( " 10| 5 = 105 students
\n" ); document.write( "I am completly lost on how to do this type of problem. Step by step advice on how to solve this is greatly appreciated. \n" ); document.write( "
Algebra.Com's Answer #279850 by Edwin McCravy(20060)\"\" \"About 
You can put this solution on YOUR website!
The mathematics department at a community college collected data for the number of students enrolled in 40 math courses over the course of one year. The following stem-and-leaf display shows the total number of students enrolled in each class.
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document.write( "A stem-and-leaf is an abbreviation for a list of numbers, where they put\r\n" );
document.write( "only the last digit of each number on the right of the \"|\" and put\r\n" );
document.write( "all the digits but the last one of each number to the left of the |.\r\n" );
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document.write( "So the first line stands for the three numbers 126, 126, 127.\r\n" );
document.write( "Since all three of those number begin with the digits \"12\", as a\r\n" );
document.write( "short cut they put just one \"12\" before the | and then they put the\r\n" );
document.write( "last digit of each number to the right of the |.  Notice that the \"667\"\r\n" );
document.write( "to the right of the | does NOT mean \"six hundred sixty-seven\", although\r\n" );
document.write( "that's what it looks exactly like.  But instead it means the three last\r\n" );
document.write( "digits of three numbers beginning with \"12\".  They are 126, 126, and 127\r\n" );
document.write( "listed on the first row below, under \"Numbers meant by stem&leaf\",  The\r\n" );
document.write( "number 3 is under \"Size\" because there are three numbers.  The total\r\n" );
document.write( "of 379 is gotten by adding 126+126+127 = 379.  At the bottom I added up\r\n" );
document.write( "the sizes and got 40, which is how many numers there are altogether\r\n" );
document.write( "represented.   I added up all the sums and got a grand sum at the bottom\r\n" );
document.write( "of 2997 total students in all the sections.    \r\n" );
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document.write( " 	  Class        Numbers meant by stem&leaf     Size  Totals\r\n" );
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document.write( " 	     12|667           126, 126, 127             3     379\r\n" );
document.write( "           11|89            118, 119                  2     237\r\n" );
document.write( "           10|0257          100, 102, 105, 107        4     414\r\n" );
document.write( "            9|1357           91,  93,  95,  97        4     376\r\n" );
document.write( "            8|00377          80,  80,  83.  87, 87    5     417\r\n" );
document.write( "            7|257            72,  75,  77             3     224\r\n" );
document.write( "            6|22359          62,  62,  63,  65, 69    5     321\r\n" );
document.write( "            5|3389           53,  53,  58,  59        4     223\r\n" );
document.write( "            4|23366          42,  43,  43,  46, 46    5     220\r\n" );
document.write( "            3|66789          36,  36,  37,  38, 39    5     186\r\n" );
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document.write( "                                                     40    2997\r\n" );
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document.write( "To get the mean, or average enrollment, you divide 2997 by 40 and get \r\n" );
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document.write( "74.925 or about 75 on the average.\r\n" );
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document.write( "The median size enrollment is the average of the two numbers right in\r\n" );
document.write( "the middle.  They are 75 and 77.  If you average them you get 76, so the \r\n" );
document.write( "median is 76.\r\n" );
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document.write( "You didn't state what you were asked to find besides the totals and the\r\n" );
document.write( "grand total, so I just guessed that you wanted the mean and the median.\r\n" );
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document.write( "Edwin
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