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# Mean And Median

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### Mean And Median

1. 1. Mean and Median<br />Ryan Sparrow<br />10-30-2009<br />
2. 2. Science Standard 2:Scientific Thinking<br />Indicator 6.2.1: Find the mean and median of a set of data.<br />Taken from: http://dc.doe.in.gov/Standards/AcademicStandards/StandardSearch.aspx<br />
3. 3. Definitions<br />Mean-the average obtained by adding the values and dividing by the number of values.<br />Median-the value that divides a set of data, written in order of size, into two equal parts.<br />
4. 4. Finding the Mean<br />Example<br />-Data: 1, 4, 3, 5, 2<br />-Add the numbers: 1+4+3+5+2=15<br />-Divide by how many numbers were added (5):<br /> 15÷5=3<br />-The mean is 3.<br />
5. 5. Finding the Median<br />Example (if there is an odd amount of data)<br />-Data: 1, 4, 3, 5, 2<br />-Put data in order from least to greatest: <br /> 1, 2, 3, 4, 5<br />-The median is the middle number: 3<br />
6. 6. Finding the Median<br />Example (if there is an even amount of data)<br />-Data: 1, 4, 3, 5, 2, 6<br />-Put data in order from least to greatest:<br /> 1, 2, 3, 4, 5, 6<br />-Find the two middle numbers, add them up, and divide by two. 3+4=7 7÷2=3.5<br />-The median is 3.5<br />
7. 7. Materials<br />Pencil/Pen<br />Paper<br />M&Ms<br />Napkins<br />
8. 8. Activity<br />Each group needs a recorder to write down the information.<br />Each person needs to count the M&Ms in their bag and tell the recorder how many they have.<br />As a group, find the mean and median of the data.<br />Record the information on the board.<br />
9. 9. Other Mean and Median Activities<br />M&Ms as a whole class<br />Class height<br />Class shoe size<br />Class backpack weight<br />Height of lima bean and pinto bean plants.<br />Many others<br />
10. 10. References<br />Indiana Department of Education standard: http://dc.doe.in.gov/Standards/AcademicStandards/StandardSearch.aspx<br />Mean: http://www.mathsisfun.com/mean.html<br />Median: http://www.mathsisfun.com/median.html<br />Pictures: ClipArt<br />M&Ms picture: http://home.fnal.gov/~cheung/rtes/RTESWeb/activity_site/images/minis%20mm.jpg<br />