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Introduction
In this activity, students will contribute data using the TI Navigator in Activity Center and create a box-and-whisker plot. Students will use technology to analyze one variable statistics.
NCTM Data Analysis Standards
select, create, and use appropriate graphical representations of data, including box plots
select and use appropriate statistical methods to analyze data
find, use, and interpret measures of center and spread, including mean and interquartile range
Files/Materials Needed
TI Navigator class system
Sticky notes
Painters Tape
1
Launch TI-Navigator on the computer and start the session.
Have each student log into NavNet on their calculator.
Tell students that the class will be creating graphs of the shoe sizes of the students in the class. Have students sketch what they predict one graph would look like.
Stick painters tape on the floor to represent a number line (no numbers.)
Instruct students to silently (encourages estimation) arrange them selves behind the line according to shoe size.
Ask students: Does the arrangement resemble the graph you drew? Explain similarities and differences. Return to class/seats.
Distribute one sticky note to each student. Instruct students to write their shoe size on the sticky note. Tell the girls to subtract two from their shoe size to convert to mens sizes for data consistency.
Draw a number line on the board. Discuss an appropriate scale and interval for the number line and label as such.
Instruct students to put their stick notes on the number line above the line without overlapping sticky notes.
Discuss line plots. Ask students: Does this arrangement resemble the graph you drew? Explain similarities and differences. Also compare and contrast the line plot to the model created earlier by class.
Class discussion: Look at the data on the graph. Record the minimum, maximum, range, median, and mode. (Option: Use Quick Poll to collect student responses to ensure class participation in the discussion.)
Use Quick Poll (Open Response) with the following prompt:
Predict the mean shoe size for the class.
2
In Activity Center, press the List tab. Set Activity Center to Contribute Form. Click Configure. Set Configuration as follows:
Number of pages: 1
Number of inputs per page: 1
Input name: Shoe Size
Destination List Name: L1
Students Submit Data: One at a time
Click Create New Lists. Set Number of Lists to 1 and click OK.
Tell students to choose Activity Center from their NavNet menu. Start the activity. By starting the activity, students will be able to input their shoe size in the form and send it to the teacher.
After students enter their shoe size, press SEND to submit the points to the Activity Center.
Click Frequency Plot. Discuss where to begin and end the plot (number line) and the interval. Click to put a check mark in Show Column Count box. Option: click to change the style. Compare and Contrast the line plot on the board to the frequency plot in the Activity Center.
X-out of frequency plot and stop the Activity.
Highlight the list and click File > Save > Save Selected Lists. Follow the on screen directions to save the List (note where the file is being saved.)
Back on the Navigator Tools tab, click Send to Class. Make sure the Force Send box is selected. Then press Finish. Students should receive the list. It will be loaded into their L1.
3
Instruct students to exit NavNet.
Create a box-and-whisker plot of L1. See Figure 1.
SHAPE \* MERGEFORMAT
Use ZOOM ZoomStat to fit the graph in the viewing window.
Note: Teacher can still monitor student progress by using Screen Capture at any time even though students are not in NavNet App.
Press TRACE. Use arrow keys to scroll through minX, Q1, Med, Q3, and maxX and discuss each.
2nd QUIT to exit the graph.
Press STAT. Arrow over to CALC. Choose 1: 1-Var Stats. Press ENTER.
Use arrow keys to scroll through the statistics given and discuss each.
Compare and contrast results. Draw and label the box-and-whisker plot around the sticky note line plot on the board! Label minX, Q1, Med, Q3, and maxX.
4
Follow up the activity with an assessment given in LearnCheck.
Extensions
Identify and discuss outliers.
Find real life applications of box-and-whisker plots.
Students write their own problems that would use a box-and-whisker plot as the most appropriate graphical representation.
Figure 1
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