S1.2.3 - Measures of dispersion – variance,

Measures of dispersion – variance, Simple interpolation may be required.; Interpretation of standard deviation, range and measures of location and dispersion. interpercentile ranges.

Use measures of dispersion – variance, to connect the rule to the data and decision in the question.

This matters because measures of dispersion – variance, determines what can be inferred or chosen; begin with the stated conditions and keep the conclusion tied to the evidence.

Example: apply measures of dispersion – variance, to one small, clearly defined case, show the key step or comparison, and explain the result in words.

Boundary: Measures of dispersion – variance, is not a universal recommendation. Check the syllabus scope, assumptions, units and the limits of the evidence before generalising.