Grouped Frequency Tables Flashcards

A table that organises data into intervals (groups) and shows the frequency of data within each interval.

The number of times a data value or range of values occurs in a dataset.

A range of values in a grouped frequency table, e.g., 0–10 or 10–20.

The value halfway between the lower and upper boundaries of a class interval, calculated as (lower boundary + upper boundary) ÷ 2.

The running total of frequencies as you move through the class intervals in a grouped frequency table.

Calculated using the formula: (Σ(f × x)) ÷ Σf, where f is the frequency and x is the midpoint of each class interval.

The class interval with the highest frequency in a grouped frequency table.

Grouped data is used when there is a large dataset, making it easier to summarise and analyse.

Exact values are not known within each class interval, so calculations like the mean are only estimates.

A graph that plots cumulative frequency against the upper boundary of each class interval, used to estimate medians and quartiles.