S1.2.1 - Histograms, stem and leaf

Histograms, stem and leaf Using histograms, stem and leaf diagrams and box plots to diagrams, box plots. compare distributions.; Back-to-back stem and leaf diagrams may be required.; Drawing of histograms, stem and leaf diagrams or box plots will not be the direct focus of examination questions.

Use histograms, stem and leaf to connect the rule to the data and decision in the question.

This matters because histograms, stem and leaf determines what can be inferred or chosen; begin with the stated conditions and keep the conclusion tied to the evidence.

Example: apply histograms, stem and leaf to one small, clearly defined case, show the key step or comparison, and explain the result in words.

Boundary: Histograms, stem and leaf is not a universal recommendation. Check the syllabus scope, assumptions, units and the limits of the evidence before generalising.