When the numerical data is represented by the sectors of a circles, the graph obtained is
Answers
pie chart (or a circle chart) is a circular statistical graphic, which is divided into slices to illustrate numerical proportion. In a pie chart, the arc length of each slice (and consequently its central angle and area), is proportional to the quantity it represents.
In a survey conducted on 100 Indians, people were asked for the countries they wish to visit, following was the data obtained.
INTERPRETATION FROM PIE-CHART - DEFINITION
concept
Here a pie chart is given which shows the likes of 1000 people towards walking, swimming, golf, cycling, and others.
We can see that a large number of people like walking since it is the largest area covered in the pie-chart.
Also, very small number of people like other activities.
PIE CHART - DEFINITION
Points to Remember:
Various observations of the data are represented by the sectors of the circle.
The total angle formed at the centre is 360.
The whole circle represents the sum of the values of all the components.
The angle at the centre corresponding to the particular observation component is given by
total value
value of component
×360
0
If the values of observation/components are expressed in percentage, then the centre angle corresponding to particular observation/component is given by
100
percentage value of component
×360
0
Steps to draw Pie Chart
Find the central angle for each component using the formula given above
Draw a circle of any radius.
Draw a horizontal radius
Starting with the horizontal radius, draw radii, making central angles corresponding to the values of respective components.
Repeat the process for all the components of the given data.