# Difference between discrete and continuous data

What is the difference between discrete and continuous data?  Discrete data usually involve counting a number of items, such as the number of books, computers, people, and so forth. Continuous data are data where numbers between any two data values make sense. ## Did the figure above helped you understand the difference between discrete and continuous data? If not keep reading!

For discrete data, numbers between two data values will make no sense. For example, suppose that the cost of producing a car is 20000  dollars. This situation will give discrete data only since you cannot produce half of a car, three-fourths of a car or two and a half car.

The table below shows the costs of producing 1, 2, 3, or 4 cars.

Number of cars         Cost                  Point

1                              20000             (1, 20000)

40000             (2, 40000)

3                              60000             (3, 60000)

4                              80000             (4, 80000)

If the company could produce 1.5 car, it will cost 30000. However, there is no such thing as 1.5 car.  The figure below shows what the graph of a discrete data will look like for the table immediately above.

Notice that we cannot connect the points since the numbers between 1 and 2, 2 and 3, 3 and 4 do not exist. On the other hand, a continuous data can have numbers between any two data values that make sense. Suppose the cost of grapes is 3 dollars per pound. The number of pounds you buy could be 1, 1.5, 2, 3, 3.5, 4, ...

Notice that 1.5 is a number between 1 and 2. By the same token, 3.5 is a number between 3 and 4. You do not have to buy exactly 1, 2, 3, 4, or 5 pounds, etc...

Here is what the graph of a continuous data will look like. In the graph above, we show the points (1 3), (2, 6), (3, 9), and (4, 12). (3, 9) of course means that 3 pounds cost 9 dollars.  Notice how any number of pounds could be chosen between 0 and 1, 1 and 2, 2 and 3, 3 and 4.

## Recent Articles 1. ### Introduction to Physics

Nov 18, 20 01:20 PM

Top-notch introduction to physics. One stop resource to a deep understanding of important concepts in physics

New math lessons

Your email is safe with us. We will only use it to inform you about new math lessons.

Tough Algebra Word Problems.

If you can solve these problems with no help, you must be a genius! Real Life Math Skills

Learn about investing money, budgeting your money, paying taxes, mortgage loans, and even the math involved in playing baseball.