Box Plots & Cumulative Frequency (Edexcel A-Level Mathematics): Flashcards

Distribution of data

Five

25th percentile, median of lower half of data

50th percentile

75th percentile, median of upper half of data

Spread and skewness

Number of observations below a particular value

Medians, quartiles, and percentiles

Add each frequency to sum of all previous frequencies

At half the total cumulative frequency

$n \times 0.9$ where $n$ is total observations

Complementary tools for analysing data distributions