These questions are designed to accompany the Survey of Eighth Graders and their Favorite Desserts Starter File.
1 Paolo made a pie-chart of the dessert column and was suprised to discover that Fruit was the most popular dessert among 8th graders! Make the pie-chart. Why is this display misleading? How is the data "dirty"?
2 What ideas do you have for how the survey designer could have made sure that the data in the dessert column would have been cleaner?
3 Shani made a bar-chart of the gender-id column. In her analysis she stated that the most common gender identity among eighth graders in her class is male. Make the bar-chart. Do you agree? Why or Why Not?
4 Make a chart showing the ages of the 8th graders surveyed. What "dirty" data problems do you spot and how are they misleading?
5 What ideas do you have for how the survey designer could have made sure that the data in the age column would have been cleaner?
These materials were developed partly through support of the National Science Foundation, (awards 1042210, 1535276, 1648684, 1738598, 2031479, and 1501927). 
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