# Standard deviation

## Standard deviation gives a relative context for interpreting how far observations are away from the mean

Standard deviation is an important measure of variability associated with continuous distributions. Standard deviation is calculated by taking the square root of the variance in a distribution. Standard deviations allow for better understanding of

**how far observations are away from the mean**and how much overall variability exists in a distribution. Standard deviations also allow for the**interpretation of individual observations in terms of their relationship to the mean**.### The steps for calculating standard deviation in SPSS

1. The continuous data is entered into a column of a database.

2. Click

3. Drag the cursor over the

4. Click on

5. Click on the continuous variable to highlight it.

6. Click on the

7. Click

2. Click

**.**__A__nalyze3. Drag the cursor over the

**D**drop-down menu.__e__scriptive Statistics4. Click on

**.**__D__escriptives5. Click on the continuous variable to highlight it.

6. Click on the

**arrow**to move the outcome variable into the**V****ariable(s):**box.7. Click

**OK**. ### The steps for interpreting the standard deviation output in SPSS

1. In the

**Group Statistics**table, look under the**Std. Deviation**column. This is the standard deviation value that is interpreted.Click on a button below to continue.

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