1. Misleading
Statistics

3. What does misleading mean?
To lead in the wrong direction.
To manipulate statistics without lying.
Misleading = Dishonesty
To intentionally deceive someone.

4. Mrs. Long’s Salaries

5. Mrs. Long’s Salaries

6. What is the difference between the two graphs?
Mrs. Long’s Salaries
Mrs. Long’s Salaries
What is the difference between the two graphs?
Do these two graphs appear to show the same information?
Why do you think someone would want to present the same information in different ways?

7. Ways To
Manipulate
A Graph

10. Which pet is most popular?
Pets
Dog
Horse
Fish
Key = or = 5 pets

11. What is misleading about this bar graph?

13. What eye color is the most frequent?

17. Why would someone want to mislead you?
To make it appear that they are correct.
Change the way the data is interpreted
To persuade someone
To influence an opinion

18. Ways to Manipulate Statistics
Change the values on the x- or y-axis.
Do not start the graph at zero.
Use different bar widths on a bar graph
Change the way you conduct your survey
Example: Survey only 6th graders when you are collecting data on the height of middle school students at IMS.
Survey’s should be random.

19. Try the examples in your notes..

20. The line graph on the left The line graph on the right
Which graph should the governor use to support his argument?
Which graph should the governor's opponent use?
The line graph on the left
The line graph on the right

21. How many calories are in a slice of pizza from Mario’s?
How many calories are in a slice of pizza from Pizza Queen?
Is this bar graph
misleading?
Explain.
120 calories
124 calories
Yes

22. The y-axis scale does not have equal spacing
How is this graph misleading?
How could you redraw the graph so it would not be misleading?
The y-axis scale does not have equal spacing
Draw the y-axis scale starting at 0 with equal spacing so that the distance between 0 and 18,000 equal distance between 18,000 and 36,000.

23. How is this graph misleading?
How could you redraw the graph so it would not be misleading?
The y-axis scale has a break so the differences in jump distances appear greater
Draw the y-axis scale starting at 0 and continuing to 7.5 using equal spacing.

24. How is this graph misleading?
How could you redraw the graph so it would not be misleading?
The y-axis scale has a break so the differences in fare appear greater.
Draw the y-axis scale starting at 0 and continuing to 7.5 using equal spacing.
Mon Tue Wed Thu Fri 13 12 11 10
Taxicab Fares
Fare ($)

25. How is this graph misleading?
How could you redraw the graph so it would not be misleading?
The y-axis scale does not start at zero so the differences in water consumed seem greater.
Draw the y-axis scale starting at 0 and continuing to 48 using equal spacing.
Water Consumed 48 40 32 24 16
Mark
Frank
Mila
Yvonne
Ounces of Water

26. Explain why each graph could be misleading and why.
Exit Ticket Quiz
Explain why each graph could be misleading and why.

27. Use the given data to make a
Misleading Activity
Use the given data to make a
misleading graph

28. Gallery Walk Walk around and observe each misleading graph.
Choose one graph (not your groups’)
On a separate sheet of paper:
Explain how that group made their graph misleading.