A researcher investigates the reaction times (in milliseconds) of sleep-deprived participants on a hazard perception task. The resulting dataset is highly positively skewed due to a few participants having exceptionally slow reaction times.
Which of the following statements is correct regarding the descriptive statistics for this study?
The mean reaction time will be lower than the median reaction time.
The standard deviation is a measure of central tendency that is unaffected by extreme scores.
The median reaction time is a more representative measure of central tendency than the mean for this skewed dataset.
The range is the most sensitive measure of dispersion because it takes every individual score in the dataset into account.
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.