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1.5 Data handling

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Question 13

A group's mean symptom score was 18.4 before an intervention and 12.7 afterwards.

Calculate the percentage reduction in the mean symptom score. Give the answer to three significant figures and show your workings.

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Markscheme

1.5 Data handling Questions

  1. IGCSE
  2. /Psychology
  3. /1.5 Data handling

56 exam-style questions on Oxford AQA IGCSE Psychology 1.5 Data handling, covering 1.5.1 Quantitative and qualitative data, 1.5.2 Primary and secondary data, 1.5.3 Mathematical expressions, 1.5.4 Measures of central tendency and range, 1.5.5 Frequency tables and diagrams, 1.5.6 Charts for data display, and 1.5.7 Normal distribution. Each one has a worked solution and a mark scheme showing where the marks go.

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