91影视

The data on the number of subjects and their opinions on sending a thank you note is provided.

A pie chart is a visual representation that represents relative frequencies corresponding to various categories as a segment (portion) of a circle or pie.The category with the highest frequency has the greatest proportion, and the category with the lowest frequency represents the smallest proportion of pie.

The following table shows the number of subjects having the given opinions:

The steps to compute the proportions corresponding to different frequencies are:

Compute the degrees on the circle (out of 360 degrees) for each category using the given formula:

$\text{Degree}\text{on}\text{the}\text{circle}=\frac{\text{Frequency}\text{of}\text{the}\text{category}}{\text{Total}\text{frequency}}脳360掳$

The total frequency is computed below:

$396+40+40+15+10=501$

The degrees corresponding to each opinion are computed below:

$$\begin{gathered} Opinio{n}_1=\frac{396}{501}脳360掳 \\ =284掳 \\ Opinio{n}_2=\frac{40}{501}脳360掳 \\ =29掳 \\ Opinio{n}_3=\frac{40}{501}脳360掳 \\ =29掳 \\ Opinio{n}_4=\frac{15}{501}脳360掳 \\ =11掳 \\ Opinio{n}_5=\frac{10}{501}脳360掳 \\ =7掳 \end{gathered}$$

The above values are rounded off so that the total is obtained as 360 degrees.

• Mark the angles on a circle corresponding to the degrees computed for each category using a protractor.
• Represent each category with a different color.

The following pie chart is constructed: