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Pie Chart: a special chart that uses 'pie slices' to show relative sizes of data.
Estatistica Pro 1 1 2006
Imagine you survey your friends to find the kind of movie they like best:
| Table: Favorite Type of Movie | ||||
| Comedy | Action | Romance | Drama | SciFi |
|---|---|---|---|---|
| 4 | 5 | 6 | 1 | 4 |
You can show the data by this Pie Chart:
It is a really good way to show relative sizes: it is easy to see which movie types are most liked, and which are least liked, at a glance.
You can create graphs like that using our Data Graphs (Bar, Line and Pie) page.
Or you can make them yourself ..
How to Make Them Yourself
Quarkxpress 12 2 download free. First, put your data into a table (like above), then add up all the values to get a total:
| Table: Favorite Type of Movie | |||||
| Comedy | Action | Romance | Drama | SciFi | TOTAL |
|---|---|---|---|---|---|
| 4 | 5 | 6 | 1 | 4 | 20 |
Next, divide each value by the total and multiply by 100 to get a percent:
| Comedy | Action | Romance | Drama | SciFi | TOTAL |
|---|---|---|---|---|---|
| 4 | 5 | 6 | 1 | 4 | 20 |
| 4/20 = 20% | 5/20 = 25% | 6/20 = 30% | 1/20 = 5% | 4/20 = 20% | 100% |
Now to figure out how many degrees for each 'pie slice' (correctly called a sector).
A Full Circle has 360 degrees, so we do this calculation:
| Comedy | Action | Romance | Drama | SciFi | TOTAL |
|---|---|---|---|---|---|
| 4 | 5 | 6 | 1 | 4 | 20 |
| 20% | 25% | 30% | 5% | 20% | 100% |
| 4/20 × 360° = 72° | 5/20 × 360° = 90° | 6/20 × 360° = 108° | 1/20 × 360° = 18° | 4/20 × 360° = 72° | 360° |
Now you are ready to start drawing!
Draw a circle.
Then use your protractor to measure the degrees of each sector.
Here I show the first sector ..
Finish up by coloring each sector and giving it a label like 'Comedy: 4 (20%)', etc.
(And dont forget a title!)
Estatistica Pro 1 1 2 Hp Motor
Another Example
You can use pie charts to show the relative sizes of many things, such as:
- what type of car people have,
- how many customers a shop has on different days and so on.
- how popular are different breeds of dogs
Example: Student Grades
| Comedy | Action | Romance | Drama | SciFi | TOTAL |
|---|---|---|---|---|---|
| 4 | 5 | 6 | 1 | 4 | 20 |
| 20% | 25% | 30% | 5% | 20% | 100% |
| 4/20 × 360° = 72° | 5/20 × 360° = 90° | 6/20 × 360° = 108° | 1/20 × 360° = 18° | 4/20 × 360° = 72° | 360° |
Now you are ready to start drawing!
Draw a circle.
Then use your protractor to measure the degrees of each sector.
Here I show the first sector ..
Finish up by coloring each sector and giving it a label like 'Comedy: 4 (20%)', etc.
(And dont forget a title!)
Estatistica Pro 1 1 2 Hp Motor
Another Example
You can use pie charts to show the relative sizes of many things, such as:
- what type of car people have,
- how many customers a shop has on different days and so on.
- how popular are different breeds of dogs
Example: Student Grades
Here is how many students got each grade in the recent test:
And here is the pie chart:
