Distribution

Building an appreciation of distribution enables students to move from examining individual values to studying aggregates, trends and patterns in data. It enables them to progress from a single distribution to comparing distributions, looking for similarities and differences between populations.

Observations could relate to:

• skewness
• symmetry
• overall spread
• outliers
• means
• medians
• clumps and gaps.

These expose the variation in the data and the story it tells about the context of the investigation.