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Year 10 - Maths

Sampling limitations

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 state the limitations of a sample and the impact of different sample sizes.

Key Notes

  • A sample can only produce conclusions for that sample.
  • A different sample may produce different conclusions.
  • The usefulness of any conclusions may be limited by the sample size.

Vocabulary To Learn

  • Sample: A sample is a subset of the population.
  • Bias: Bias can be present in any sample collected from a population and may affect the results of a statistical investigation.

Common Mistakes To Avoid

  • Samples always represent the population from which they are drawn as they come from that population.

3 Quick Questions (With Answers)

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

A sample can only produce conclusions for that sample. A different sample may produce different conclusions.

2. Use this key word in a maths sentence and explain it clearly. 'Sample'

A sample is a subset of the population. Use this word when showing your method, then check your final answer is reasonable.

3. Spot and fix this common maths mistake.

Mistake: Samples always represent the population from which they are drawn as they come from that population. Correction: Taking multiple large samples allows us to begin to generalise the results to the whole population.

More Lessons In This Unit

Browse all guides in the Year 10 Maths guide library.