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Data recording, analysis and presentation

Data recording, analysis and presentation

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Question 81

A psychologist investigates the effects of mindfulness meditation on anxiety levels (measured on a scale from 0 to 50, where higher scores indicate greater anxiety) in two groups of participants:

  • Group A (Mindfulness meditation)
  • Group B (Control group)

The descriptive statistics for the anxiety scores are:

  • Group A: Mean=18.5\text{Mean} = 18.5Mean=18.5, Standard Deviation=2.1\text{Standard Deviation} = 2.1Standard Deviation=2.1
  • Group B: Mean=24.2\text{Mean} = 24.2Mean=24.2, Standard Deviation=8.4\text{Standard Deviation} = 8.4Standard Deviation=8.4

Which of the following statements is the most accurate interpretation of these descriptive statistics?

A

Participants in Group A had a wider spread of anxiety scores than participants in Group B, and Group B's scores were more consistent.

B

Participants in Group A had more consistent anxiety scores than participants in Group B, and Group B had a higher average level of anxiety.

C

The range of anxiety scores in Group A is guaranteed to be exactly 4.24.24.2, while the range of scores in Group B is guaranteed to be exactly 16.816.816.8.

D

The mean score for Group B is a more representative summary of its group's performance because a larger standard deviation indicates greater reliability.

Markscheme

Data recording, analysis and presentation Questions

  1. A Level
  2. /Psychology
  3. /Data recording, analysis and presentation

513 exam-style questions on OCR A Level Psychology Data recording, analysis and presentation. Each one has a worked solution and a mark scheme showing where the marks go.

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