# What is precision?

##### 1 Answer

**Precision** is a way of measuring the closeness of a set of answers to the others presented by the experimenter; that is, it is a measure of consistency or reproducibility.

#### Explanation:

Throughout chemistry there's a big difference between two large terms. **Accuracy** vs **Precision**. There's also a big difference between them.

Let's start with accuracy. Let's say the accepted answer to a problem is 1. Here's the **accurate** dataset of answers that your class got.

As you can see, most answers are very close to 1.

**An accurate answer is very close to the accepted result**. If the accepted answer is 4 and you got 3.9 while everyone else got 0, your answer is the most

**accurate**.

Now, what about precise? Let's take a look at a data set. The accepted answer will be 1 again.

As you can see, none of these answers are remotely close to 1. However, they are all very precise to each other.

**A precise answer is very close to the other answers, but not necessarily close to the accepted answer**. If the accepted result is 5 and you got 200, your answer is

**precise**if the rest of the class gets answers close to 200.

Here's an infographic that helps explain.