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Data recording, analysis and presentation

Data recording, analysis and presentation

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Question 240

A clinical psychologist records the duration of sleep (in minutes) for 8 patients during a sleep clinic study. The recorded times are:

240,255,260,275,280,285,290,720 240, \quad 255, \quad 260, \quad 275, \quad 280, \quad 285, \quad 290, \quad 720 240,255,260,275,280,285,290,720

Which measure of central tendency is the most appropriate to use for this dataset, and why?

A

The mean, because it is the most sensitive measure as it includes every sleep duration in its calculation.

B

The median, because the extreme outlier (720 minutes720\text{ minutes}720 minutes) would disproportionately distort the mean.

C

The mode, because it is unaffected by extreme values and represents the most common category of sleep duration.

D

The range, because it is the most reliable measure to summarise the overall spread of the patient sleep times.

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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