Topics
Language and Use of Statistics
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CanadaON
Grade 12

Real Life Data - Misleading Graphs

Lesson

Interactive practice questions

Refer to the pie chart to answer the following questions.

A pie chart titled "2012 Presidential Run - GOP candidates" showing support percentages for three individuals. The chart has three segments: a blue section, a dark red section, and a light orange section. Below it is the legend. The blue section is Back Huckabee with $63%$63%. The dark red section is Back Palin with $70%$70%. The light orange section is Back Romney with $60%$60%. At the bottom is a note indicating the source, "Source: Opinions Dynamic."
a

What do the percentages in the pie chart sum to?

b

Is this possible for a pie chart?

Yes

A

No

B
Easy
< 1 min

What is misleading about this line graph?

Easy
< 1 min

Refer to the graph to answer the following questions.

Easy
1 min

The figure shows the number of tourists from each country to the United States. What is wrong with the length of the line segments representing each country?

Medium
< 1 min
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Outcomes

12C.D.2.3

Interpret statistics presented in the media, and explain how the media, the advertising industry, and others (e.g., marketers, pollsters) use and misuse statistics (e.g., as represented in graphs) to promote a certain point of view

12C.D.2.4

Assess the validity of conclusions presented in the media by examining sources of data, including Internet sources (i.e., to determine whether they are authoritative, reliable, unbiased, and current), methods of data collection, and possible sources of bias (e.g., sampling bias, non-response bias, a bias in a survey question), and by questioning the analysis of the data (e.g., whether there is any indication of the sample size in the analysis) and conclusions drawn from the data (e.g., whether any assumptions are made about cause and effect)

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