When you enter a value for Alpha on a dialog box, you might receive the following message even when you insert a value between 0 and 0.5 (such as 0.05).
“Alpha must be a number between 0 and .5”
You might receive this error message when your system uses a comma instead of a period as the decimal symbol. You have the following choices in this case:
- Change the decimal symbol from comma to period. You need to do this in Windows and in Excel.
- Click on the Config button on the Real Statistics main dialog box (the one that comes up when you press Ctrl-m) and choose the Use Percentage option. Now instead of entering .05 (or 0,05) as the value for Alpha you should enter 5 (meaning 5%).
- Enter 0 for the value of Alpha. In the output, change the cell containing Alpha from 0 to whatever value you want (using your system’s decimal symbol).