2.4.3

Sampling

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Sampling

Governments and health organisations track cases of diseases to inform their policy decisions. These can be global cases, or cases in a target group (called the target population). For example, the number of incidences of a particular disease in Scotland, or in 60-79 year olds in Manchester.

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Big populations and sampling

  • As a country's population is so large, not everybody can be tested.
  • Instead, we take a sample and assume that the pattern is true for the whole population.
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Sampling example

  • If 10 people in a sample of 100 people have a particular disease, 10% of the sample has the disease.
    • We assume that 10% of the population will also have the disease.
  • If the population has 2000 people, then we predict 200 people in the population have the disease.

Jump to other topics

1Cell Biology

1.1What's in Cells?

1.2Cell Division

1.3Transport in Cells

2Organisation

2.1Principles of Organisation

2.2Enzymes

2.3Circulatory System

2.4Non-Communicable Diseases

2.5Plant Tissues, Organs & Systems

3Infection & Response

4Bioenergetics

5Homeostasis & Response

5.1Homeostasis

5.2The Human Nervous System

5.3Hormonal Coordination in Humans

5.4Plant Hormones

6Inheritance, Variation & Evolution

7Ecology

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