A materials scientist observes that the tensile strength of individual carbon fibre composite samples fabricated under condition C1 C_1\,C1 varies significantly. In contrast, there is almost no variation in the mean tensile strength across seven different laboratories using standard protocols. The scientist intends to compute a statistical measure of spread to quantify the variation in strength for each group.
State one measure of dispersion that the scientist could use for this analysis.
235 exam-style questions on AQA A Level Psychology Data handling and analysis. Each one has a worked solution and a mark scheme showing where the marks go.