NCEA Level 3 Statistics

NumeracyLevel 1Level 2Level 32026 exam dates

AS 91580 · Investigate time series data

4 lessons.

Features of a time seriesNotesMoving averages and the trendNotesReporting on a time seriesNotesSeasonal effects and forecastingNotes

AS 91581 · Investigate bivariate measurement data

4 lessons.

Evaluating a relationshipNotesFitting a linear modelNotesPredicting and residualsNotesScatter plots and correlationNotes

AS 91582 · Use statistical methods to make a formal inference

4 lessons.

Comparing populationsNotesFormal confidence intervalsNotesJustifying an inferenceNotesSampling variability and bootstrappingNotes

AS 91584 · Evaluate statistically based reports

5 lessons, about 32 minutes.

Margin of error: the three rules of thumb6 minConfidence intervals, claims, and why overlap fails7 minExperiments vs observational studies: what you can conclude7 minSurveys and bias: sampling frames, non-response and wording6 minEvaluating a statistical report: the full answer7 min

5 worked problems, about 51 minutes.

Margin of error: 7 exam questions solved step by step10 minConfidence intervals: 7 exam questions solved step by step10 minStudy design: 7 exam questions solved step by step10 minSurveys and bias: 7 exam questions solved step by step10 minEvaluating reports: 7 exam questions solved step by step10 min
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