A psychologist investigates the impact of sleep deprivation on cognitive performance. The reaction times (in milliseconds) of 50 participants are recorded. The dataset contains a few extremely high reaction times due to participants momentarily falling asleep, resulting in a positively skewed distribution.
Which of the following statements is correct regarding the measures of central tendency for this dataset?
The mean is smaller than the median, and the median is the most appropriate measure of central tendency because it is less affected by the extreme values.
The mean is larger than the median, and the median is the most appropriate measure of central tendency because it is less affected by the extreme values.
The mean is larger than the median, and the mean is the most appropriate measure of central tendency because it is more sensitive to all scores in the dataset.
The mean, median, and mode will remain equal because the sample size is sufficiently large (N=50N = 50N=50) to normalize the distribution.
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.