Frequency Distributions (Junior Cert Mathematics): Flashcards

Data organised into intervals or ranges

Simplifies large data sets

Makes patterns and trends easier to spot

Middle point of an interval

Add lowest and highest values, divide by $2$

$\frac{10 + 20}{2} = 15$

Represents entire interval for calculations

Multiply each mid-interval by its frequency

Divide sum by total frequency

Frequencies added progressively down the table

Mid-interval of interval containing middle value

Interval with highest frequency