[Maths Class Notes] on Pie Chart Pdf for Exam

As the name implies, a Pie Chart is a graph that displays the data in a circular format. It is a type of pictorial representation of data that shows the relative sizes of the slices of pie. It requires both categorical and numerical variables for a Pie Chart to work. In this case, the term “pie” represents the whole and the term “slices” represents the parts of the whole. 

Pie diagrams are also called circle charts. They provide a visual representation of statistical data. Pie diagrams represent a proportionate part of a whole. These diagrams can be useful when trying to figure out something’s composition. As a result, pie diagrams are replacing bar graphs, line graphs, line plots, histograms, etc.

The Formula of Pie Chart

There are many types of data representations, including Pie Charts. The Pie Chart is divided into segments and sectors, and each segment and sector represents a corresponding portion of the total (percentage). A total of 360° is represented by the data.

The total value of the pie is always 100 percent.

Here are the steps you can follow in order to determine the percentage on a Pie Chart:

1. Data categorization

2. Calculate the total based on the collected data.

3. Divide the categories by the heads.

4. Convert the numbers into percentages.

5. And finally, convert the percentages into degrees.

Therefore, the Pie Chart formula is given as

(Given Data/Total value of Data) × 360°

 

Definition of Pie Chart:

A graph in which a circle is divided into sections that represent a portion of the whole.

 

Practical Implications of Pie Chart

Due to its ease of data reading and accessibility, the Pie Chart is widely used. Pie Charts make comparing data easy since they are simple graphs. Here is an example of a Pie Chart:

1. During the growth phase of a business, it enables you to compare business profits, turnover, exposure, etc.

2. Categorical data can also be represented with it.

3. A Pie Chart is generally used to compare data.

4. The amount of time allotted to each section is determined by Pie Charts in schools.

5. The percentage of two-wheelers or four-wheelers owned by people is used to measure the relative size of data such as the type of house people have.

6. The number of weekend customers visiting retail stores.

7. Food and beverage preferences of people in restaurants.

8. Several brand names in the mobile market.

9. Comparative sales of every brand.

 

Advantages

• Despite the simplicity of the image, it’s easy to comprehend.

• A fraction of data can be visualized visually as a part of the whole.

• Even uninformed audiences can benefit from this tool for good communication.

• A data comparison gives a quick overview of the data to the audience to allow for quick analysis.

• It can be removed from the charts by using this line chart, which eliminates the need for readers to examine or measure underlying numbers.

• It is possible to manipulate data pieces in a Pie Chart to emphasize certain points.

 

Disadvantages

• In the event of too much data, it becomes less effective.

• The more data, the less effective it is. It may not help here to add data labels and numbers since those themselves will become cluttered and difficult to understand.

• A series is needed to compare more than one set of data, as this chart represents only one set.

• The reader might have difficulty analyzing the information and assimilating it quickly because of this.