The statistical symbol x-bar represents a sample mean in contrast to the Greek symbol *mu*, which looks similar to a u and represents the population mean. To include the x-bar symbol in regular text, combine diacritical marks or use Alt-Codes for the quickest solution, but within equations, use accents to construct the symbol.

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## Using Alt-Codes

**Alt-Codes offer the quickest method of entering the x-bar symbol**, because you don't need to open additional dialogs, and the effect is identical to using the Symbols dialog to add the horizontal bar. Word 2013 contains two appropriate Alt codes: 0772 and the slightly longer bar 0773.

#### Step

Type an **x** where you want the x-bar symbol to appear, and then hold down the **Alt** key.

#### Step

Type **0772** or **0773** using your numeric keypad. When you release the Alt key, the bar appears above the x.

## Using the Symbol Dialog

#### Step

Type an **x** where you want the x-bar symbol to appear.

Click the **Insert** tab, select **Symbol** from the Symbols group and choose **More Symbols**.

Double-click the **0304** or **0305** character, listed under Combining Diacritical Marks. Adding these marks is identical to using the 0772 or 0773 Alt-Codes, respectively.

## Using the Equation Editor

Click the **Insert** tab and select **Equation** from the Symbols group.

Select the **Design** tab, click the **Accent** drop-down menu from the Structures group and choose the **Bar** symbol.

Click the empty square with the bar on top and type an **x**. When you click outside the equation, the x-bar symbol displays normally.