Topics
Language and Use of Statistics
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CanadaON
Grade 12

Misrepresentation of Results

Lesson
Practice

Interactive practice questions

Lachlan asks $120$120 Year 12 students at his school how much time they spend on homework per night. $78$78 Year 12 students say they do more than $3$3 hours. At a meeting of the student council Lachlan reports "$65%$65% of students at this school do too much homework.

Which one of the following explains why this is misleading?

The survey does not represent the population of the school.

A

The question should have been multiple choice.

B

The question was biased.

C

The sample size was too small.

D
Easy
< 1min

How does this graph misrepresent the statistics?

Select the two appropriate options.

Easy
< 1min

A newspaper states: "Oil prices have risen by $33%$33% over the last two years."

In the article it states that in 2010 the oil prices increased by $10%$10% and in 2011 the oil price increased by $23%$23%.

Easy
< 1min

How does this graph misrepresent the statistics collected?

Medium
< 1min
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Outcomes

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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