Averages (Mean, Median, Mode) (AQA A-Level Biology): Flashcards

Central tendency

$\bar{x} = \frac{\sum x}{n}$

Sum all values ÷ number of measurements

Same as original measurements

Middle value when data arranged in order

When dataset contains outliers

Most frequently occurring measurement

Distribution with multiple peaks

Repeated measurements account for natural variability

Mean is affected/pulled by outliers