**Standard deviation** measures how close our numerical data points are to one another and to the “true” value.

Concept #1: Understanding Standard Deviation

Example #1: Calculate the standard deviation for the following results: 5.29, 5.35 and 5.31.

Practice: Calculate the standard deviation for the following results: 0.039, 0.061 and 5.3 x 10** ^{-2}**.