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Data handling and analysis

Data handling and analysis

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Question 22

Marine Microplastic Contamination Study

In an environmental monitoring project, a research vessel collected 115 sediment core samples across an urban estuary to measure microplastic contamination. The concentration of synthetic polymer particles in each sample was recorded in milligrams per kilogram (mg kg−1\text{mg kg}^{-1}mg kg−1) of dry sediment.

The environmental scientists computed key measures of central tendency for these concentrations:

  • Mean concentration = 74.2 mg kg−174.2\text{ mg kg}^{-1}74.2 mg kg−1
  • Median concentration = 51.6 mg kg−151.6\text{ mg kg}^{-1}51.6 mg kg−1
  • Mode concentration = 28.0 mg kg−128.0\text{ mg kg}^{-1}28.0 mg kg−1

Identify the type of distribution shown by these results.

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Markscheme

Data handling and analysis Questions

  1. A Level
  2. /Psychology
  3. /Data handling and analysis

235 exam-style questions on AQA A Level Psychology Data handling and analysis. Each one has a worked solution and a mark scheme showing where the marks go.

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