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Location: Eugene, Oregon, United States

Tuesday, February 13, 2007

Box and Whisker Plots, Part 1

Students were given packets of mini M & M's and instructed to sort the candy by color. Data was shared with the class, and this data was then used to help us learn about box and whisker plots. To make a box and whisker plot, follow these simple steps:

1. Order the data set from largest to smallest.
2. Find the median of the data set. This number is the middle quartile.
3. Find the median of the upper half of the data. This number is the upper quartile value.
4. Find the median of the lower half of the data. This number is the lower quartile value.
5. Draw a box from the lower quartile value to the upper quartile value. Draw a line to show the true median of the data set.
6. To draw the left whisker, draw a line from the lower quartile line to the low extreme value. To draw the right whisker, draw a line from the upper quartile line to the high extreme value.

Tonight's Homework: Complete both sides of the two worksheets we started in class. Be sure to include color!

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