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Australia
Year 9

10.04 Samples from a population

Interactive practice questions

After the government decided to increase the minimum retirement age, a news poll selected a group of people to ask their opinions on the changes.

What kind of people should be represented to avoid sampling bias?

People in the community who have a wide variety of views, even if they are not directly affected by the changes.

A

People in the community who have a wide variety of views, excluding politicians and policy makers.

B

Only people in the community who would be directly affected by the changes.

C

Only people who are employed.

D
Easy
< 1min

Irene is interested in which students from her school catch public transport. Select whether the following sampling methods are likely to be biased or not.

Medium
< 1min

A political polling company calls $1000$1000 people at home between $4$4pm and $6$6pm on weeknights to find out who they are most likely to vote for in an upcoming election. They publish their numbers based on the responses of only the $450$450 people who answered their call.

Medium
1min

Marine biologists want to determine if a local species of fish is growing to a smaller size than it used to. They collect and measure $150$150 of the $450$450 fish known to exist in the area.

Medium
< 1min
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