General Mathematics · Unit 2 · Univariate data analysis 1 · Making sense of data relating to a single statistical variable

Classify a categorical variable as ordinal or nominal and use tables and pie, bar and column charts to organise and display the data, e.g. ordinal: income level (high, medium, low); nominal: place of birth (Australia, overseas).

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Question 1

A library records the reading preferences of 120 members across three categories: Fiction, Non-Fiction, and Reference. The results are shown in the table. What percentage of members who prefer Non-Fiction are aged 18–35?

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More in Making sense of data relating to a single statistical variable

Classify a numerical variable as discrete or continuous, e.g. discrete: the number of people in a room; continuous: the temperature in degrees Celsius.

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