The problem of undertaking inference in the classical linear model when the covariates have been measured with error is investigated from a geometric point of view ...

Polygons are multi-sided shapes with different properties. Shapes have symmetrical properties and some can tessellate. Loci and constructions - Eduqas Loci are a set of points with the same property.

Praxis the robot and Alan the “human man” present their animated guide to measurement and the units we use for it. They look at the importance of standard measures, appropriate scales and accuracy.