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Year 10 - Maths

Capture/recapture sampling method

Sampling

Unit Summary

In this unit pupils will learn how to sample, and explore accuracy and limitations with various sampling strategies and data collection techniques.

Lesson Summary

You will learn to use the capture/recapture sampling method to estimate population size.

Key Notes

  • There are situations in which you may not know the size of a population.
  • The capture/recapture sampling method allows you to estimate population size.
  • The size of the initial sample affects how accurate your estimation will be.

Vocabulary To Learn

  • Capture/recapture: Capture-recapture is a sampling method which allows us to estimate the size of a population without counting it fully. It is very useful when the entire population may be too difficult to count.

Common Mistakes To Avoid

  • Pupils may struggle to rearrange the equivalent fractions.

3 Quick Questions (With Answers)

1. Solve this in steps: explain the method from this lesson and why each step matters.

There are situations in which you may not know the size of a population. The capture/recapture sampling method allows you to estimate population size.

2. Use this key word in a maths sentence and explain it clearly. 'Capture/recapture'

Capture-recapture is a sampling method which allows us to estimate the size of a population without counting it fully. It is very useful when the entire population may be too difficult to count. Use this word when showing your method, then check your final answer is reasonable.

3. Spot and fix this common maths mistake.

Mistake: Pupils may struggle to rearrange the equivalent fractions. Correction: A ratio table may be easier for pupils to use instead.

More Lessons In This Unit

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