The statistical investigation process
Question/problem, investigation method, data collection, analysis, interpretation and assumptions; Critiquing statistical claims and evidence
Loading personal best…Year 11 · General Mathematics
Statistical investigation
Choose a subtopic to practise.
Subtopics
Sampling and collecting data
Purpose of sampling and target population; Bias and reliability; Simple random, stratified and systematic samples; Sample size effects
Loading personal best…Classifying and organising data
Nominal/ordinal and discrete/continuous data; Frequency/count/proportion tables; Bar/pie charts, dot/stem plots and histograms; Appropriate and misleading displays; justified treatment of outliers
Loading personal best…Distribution shape, centre and spread
Distribution shape: symmetry, skew and modes; Mean/median choice and outliers; Box plots, quartiles, range/IQR, standard deviation; 1.5-IQR outlier fences; Sample statistics versus population parameters and sample-size reliability
Loading personal best…Comparing data groups
Comparison across groups using suitable common-scale displays; Handling outliers, shape, centre and spread; Categorical proportions and modal category; Evidence-based conjectures and limitations
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