Statistical investigations

What the teaching sequence covers here

Plan and collect multivariate data, with at least one categorical and one numerical variable, to answer summary, comparison, relationship or time-series investigative questions, distinguish primary from secondary data, and calculate five-number summaries (minimum, quartiles, median, maximum) and the interquartile range.

This is ChalkBee's own paraphrase of the official teaching sequence, not the Ministry's wording. Tahurangi curriculum content is Crown copyright, Ministry of Education, licensed CC BY-NC 4.0, so we describe it in our own words and cite the source: NZC Mathematics and Statistics Phase 4 (Years 9-10). Always check the official page for the exact requirement.