Collection and Presentation of Data

Core concept

Choosing appropriate class intervals is important — too few intervals can hide meaningful patterns in the data, while too many can make the table cluttered and hard to interpret at a glance. Once organised, data can be visually presented using histograms (similar to bar graphs but for continuous, grouped data with no gaps between bars) or frequency polygons (line graphs connecting the midpoints of each class interval's frequency), each offering different visual insights into the data's distribution.