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1. For **Windows** or **Linux** - Press **Ctrl+D**

2. For **MacOS** - Press **Cmd+D**

3. For **iPhone (Safari)** - **Touch and hold**, then tap **Add Bookmark**

4. For **Google Chrome** - Press **3 dots** on top right, then press the **star sign**

1
### Step 1

Enter your set of numbers in the input field. Numbers must be separated by commas.

2
### Step 2

Press Enter on the keyboard or on the arrow to the right of the input field.

3
### Step 3

In the pop-up window, select “Find the Population Standard Deviation”. You can also use the search.

The population standard deviation can be used when it is possible to measure an entire population. To calculate it you need to find the square root of the variance of a presented data set. If it possible to sample every member of a population, then you can find the standard deviation of the entire population.