Significan Figures, Scientific Notation Back to the Table of Contents Numbers and Their Application - Lesson 9 Scientific Notation, Significant Figures, etc.
Precision is a measure of exactness.
Accuracy and precision, although similar in meaning, have a very subtle difference important to mathematics and science in general and statistics specifically. You can have one without the other, neither, or, best of all, both together. As you can see below, accuracy has to do with repeatability. Here is an example involving e . It is an important number we will study further in lesson 14 .