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NSWMaths Standard 2Quick questions
Year 11: Data Analysis
Quick questions on Classifying and representing data for HSC Maths Standard 2
3short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.
What is categorical data?Show answer
A categorical variable sorts each item into a named group. The values are labels, not amounts, so arithmetic on them is meaningless: there is no "average eye colour". Categorical data splits in two:
What is numerical data?Show answer
A numerical variable takes values that are genuine numbers you can count or measure and do arithmetic with (a mean, for instance). Numerical data also splits in two:
What is choosing an appropriate display?Show answer
The type of data decides which graph is appropriate, and a marker checks that your display fits the type:
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