document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=131590>Question 131590</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Please help me solve this:Tyre's test grades were: 76, 82, 95, 82, 78, 96, 91. His teacher will allow Tyre to choose the central tendency measure to be used for his test grades.<BR>\n" );
document.write( "                      A. Which measure should Tyre use? </SPAN>\n" );
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document.write( "Tyre's test scores are 76, 82, 95, 82, 78, 96, 91<BR>\n" );
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document.write( "The three measures of central tendency are the mean, the median, and the mode.<BR>\n" );
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document.write( "Let's first look at the mode. The mode is the value that occurs the most often in the list.<BR>\n" );
document.write( "In this case the mode is 82 because he has two tests with a grade of 82. All the other scores<BR>\n" );
document.write( "in the list occur only once each. So, if Tyre elects to take the mode he will get a score of 82<BR>\n" );
document.write( "for his test grades.<BR>\n" );
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document.write( "Next let's look at the median. The median is the \"middle\" score in the list. In order to find<BR>\n" );
document.write( "the median, we arrange the scores in ascending order. When we do that the scores in order are:<BR>\n" );
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document.write( "76, 78, 82, 82, 91, 95, 96<BR>\n" );
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document.write( "As you read the scores from left to right, the middle score in the list is the second 82 <BR>\n" );
document.write( "because there are three scores below it (76, 78, and 82) and three scores above it (91, 95, and 96).<BR>\n" );
document.write( "So if Tyre elects to take the median score he also gets an 82 for his test grades.<BR>\n" );
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document.write( "Now let's find the mean (or the average) score. To find the mean we add up all the test<BR>\n" );
document.write( "scores and divide by the number of tests. So we add 76 + 78 + 82 + 82 + 91 + 95 + 96 and we<BR>\n" );
document.write( "get a total of 600. Then we divide by the number of tests (7) and we find that 600/7 = 85.7143<BR>\n" );
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document.write( "This tells you that if Tyre elects to take the mean score he will get 85.7143 for his<BR>\n" );
document.write( "test grades ... so he is better off if he takes the mean (or average score) as his test score.<BR>\n" );
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document.write( "Hope this helps you to understand the differences among mean, median, and mode.<BR>\n" );
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document.write( " </SPAN>\n" );
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