A researcher compares the consistency of memory recall scores between two groups of participants. Group A has a range of 15 and a standard deviation of 2.1. Group B has a range of 15 and a standard deviation of 4.8.
Which of the following statements provides the most accurate interpretation of these measures of dispersion?
Group A's scores are more spread out from the mean than Group B's, because Group A has a smaller standard deviation relative to its range.
Group B's scores are more consistently clustered around the mean than Group A's, because a larger standard deviation indicates greater clustering.
Both groups show identical overall dispersion because their ranges are equal, meaning the standard deviations can be ignored.
Group A's scores are more consistently clustered around the mean than Group B's, because standard deviation accounts for all scores and is lower in Group A.
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.