NSW Y12 Maths - Advanced Descriptive Statistics Displaying Data 2

Resources for Displaying Data 2

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Displaying Data 2 Theory

In representing and dis playing data there are many formats. The following questions involve types of bar graphs, two way tables and dot plots.\\  \textbf{Example}\\ Given the data in the following dot-plot, determine the median score. \begin{center} \begin{tikzpicture}[yscale=0.4,xscale=0.6] \draw[xstep=2cm,ystep=1cm, line width=0.5pt, black!30!white] (0,0) grid (12,7);  \foreach \y/\x in {0,1,...,7} \draw[line width=1pt] (0, \y ) edge (0, \y) node[black,anchor=north,xshift=-0.3cm,yshift=0.3cm]{\scriptsize \(\x\)}; \foreach \x in {0,2,4,6,8,10,12} \draw[line width=1pt] (\x, 0)--(\x, 0) node[black,anchor=north,yshift=-0.1cm]{\scriptsize \(\x\)}; \node[align=center] at (6,7.7) {  Quiz 3};  \foreach \x/\y in {1/1,2/2,3/3,4/4,5/4,6/6,7/3,8/2,9/2,10/1} \node[draw=blue!70,circle, fill=blue!70, minimum size=1pt,inner sep=2pt] at (\x,\y) {};  \end{tikzpicture} \end{center}  \textbf{Solution}\\ \(\begin{aligned}[t] \text{Total number of scores} &=28 \end{aligned}\)\\ \(\begin{aligned} \text{median} &=\frac{14th\ \text { score } + 15th\ \text { score }}{2} \\ &=\frac{5+6}{2} \\ &=5.5 \end{aligned}\)\\

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  • Displaying Data 2 - Video - Two Way Tables

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