Grouped Frequency Distributions (Leaving Cert Mathematics): Flashcards

Method of organizing data into intervals

Number of data points in a range

Non-overlapping ranges

Usually equal width

Number of data points within each class interval

Central value of a class interval

$\frac{\text{Lower Bound} + \text{Upper Bound}}{2}$

Running total of frequencies

Proportion of data in each interval

$\frac{\text{Frequency}}{\text{Total Frequency}}$

Subtract smallest value from largest

Between 5 and 10 intervals

$\frac{\text{Range}}{\text{Number of Intervals}}$