 Teacher resources and professional development across the curriculum

Teacher professional development and classroom resources across the curriculum            Session 4, Part D:
The Box Plot (25 minutes)

In This Part: Five-Number Summary with Measurement Data | Drawing a Box Plot

Now we'll look at how you can represent the Five-Number Summary graphically, using a box plot. For this activity, we will work with a set of 12 noodles with the following measurements (in millimeters):  12 Noodles (in millimeters)   23 28 33 41 56 74 81 91 102 109 118 122    Problem D1 Why is it necessary to order the data before creating a Five-Number Summary? Let's create a Five-Number Summary for this set of ordered data: Determine Q1, Med, and Q3: The lines representing Q1, Med, and Q3 each have lengths that are halfway between their adjacent noodles: Q1 = (33 + 41) / 2 = 37 Med = (74 + 81) / 2 = 77.5 Q3 = (102 + 109) / 2 = 105.5 Here is the Five-Noodle Summary: Add a vertical number line: Here is the Five-Number Summary:    Session 4: Index | Notes | Solutions | Video