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Match each variable with its classification on the right. (2 marks)
\begin{array} {ll} \text{A. Hair colour of students in Year 7} &\text{1. Numerical discrete} \\\text{B. Heights of players in the Boomers basketball team} & \text{2. Categorical ordinal} \\\text{C. The number of people living in each household in NSW}\ & \text{3. Numerical continous}\\\text{D. A, B, C, D, E grades on a report card} & \text{4. Categorical nominal}\end{array}
\(\text{A}\longrightarrow 4,\ \text{B}\longrightarrow 3,\ \text{C}\longrightarrow 1,\ \text{D}\longrightarrow 2\)
\(\text{A. Hair colour is data grouped in categories with no order}\)
\(\therefore\ \text{4. Categorical nominal}\)
\(\text{B. Heights are measurements which are numerical and continuous}\)
\(\therefore\ \text{3. Numerical continous}\)
\(\text{C. The people living in each household are counted}\)
\(\therefore\ \text{1. Numerical discrete}\)
\(\text{D. Grades on a report card are categorical but the order is important}\)
\(\therefore\ \text{2. Categorical ordinal}\)