Experimental Probability
Name(s) ___________________________________
1. If you spin the spinner at the right 25 times, predict how many times you will spin each
color.
orange __________
red __________
green __________
yellow __________
purple __________
2. Go to the website Virtual Manipulatives.
3. Click on Data Analysis & Probability under Grades 6–8. Choose Spinners.
4. Spin the spinner 25 times and record the results in the following tally chart.
Outcome
Tally
orange
red
green
yellow
purple
5. Add the tally marks from the tally chart and write the number of times you got each color.
orange ______ red ______
green ______
yellow ______
purple ______
6. How do the outcomes of your experiment compare to the predictions you made before
spinning the spinner?
© 2009 Drexel University
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7. Click the Change Spinner button in the applet.
8. Change the number of regions for Purple to 3 and for Yellow to 2.
9. How many regions are being used by all the colors?
10. Click Apply and notice that your spinner has changed.
11. If you spin the new spinner 32 times, predict how many times you will spin each color.
orange ______ red ______
green ______
yellow ______
purple ______
12. Spin the spinner 32 times and record your results in the following tally chart.
Outcome
Tally
orange
red
green
yellow
purple
13. Add the tally marks from the tally chart and write the number of times you got each color.
orange ______ red ______
green ______
yellow ______
purple ______
14. How do the outcomes of your experiment compare to the predictions you made before
spinning the spinner?
15. Annie spun the spinner 60 times and got the results in the table below. Predict how many
regions each of the colors has in the spinner if she used 12 regions total.
© 2009 Drexel University
Outcome
Times Spun
orange
10
red
5
green
20
yellow
10
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Predicted
Regions
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purple
© 2009 Drexel University
15
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