Variation

Variation

Example 2

Find the variance and standard deviation of the following set of values:

variance_ex2-1

Step 1. Find the mean of the data.

variance_ex2-2

Step 2. Find the difference between each data point and the mean.

variance_ex2-3

Step 3. Square each value from Step 2.

variance_ex2-5

Step 4. Find the mean of the values from Step 3.

variance _ ex2-6

Variance = 4