Visualizing Data · Example 1

Recall, in which a teacher recorded the responses on the first question of a multiple choice quiz, with five possible responses (A, B, C, D, and E). The raw data was as follows:

$$\begin{array}{cccccccccccccc}\text{A}& \text{A}& \text{C}& \text{A}& \text{B}& \text{B}& \text{A}& \text{E}& \text{A}& \text{C}& \text{A}& \text{A}& \text{A}& \text{C}\\ \text{E}& \text{A}& \text{B}& \text{A}& \text{A}& \text{C}& \text{A}& \text{B}& \text{E}& \text{E}& \text{A}& \text{A}& \text{C}& \text{C}\end{array}$$
We computed a frequency distribution that looked like this:

$$\begin{array}{cc}\text{Response to First Question}& \text{Frequency}\\ \text{A}& \text{14}\\ \text{B}& \text{4}\\ \text{C}& \text{6}\\ \text{D}& \text{0}\\ \text{E}& \text{4}\end{array}$$
$Proportionofacategory=Categoryfrequency/Totalnumberofdataunits$
Now, let's compute the proportions for each category.

OpenStax, Contemporary Mathematics · §8.2 Visualizing Data · Example 1