To type the character x bar (for the statistical mean) in an Excel spreadsheet, you can follow these steps:

1. Click on the cell where you want to insert the x bar symbol.
2. Go to the Insert tab in the Excel ribbon.
3. Click on the Symbol button in the Symbols group.
4. In the Symbol dialog box, select Symbol in the Font dropdown menu.
5. Scroll down until you find the x bar symbol (it should be around the middle of the list).
6. Click on the x bar symbol to select it.
7. Click on the Insert button to insert the symbol into the cell.
8. Close the Symbol dialog box.

Alternatively, you can use the keyboard shortcut to insert the x bar symbol. The shortcut is (make sure to use the numeric keypad to enter the numbers). This will insert the x bar symbol into the cell.