Menu: View→Analysis Properties→Bootstrap→BC confidence level
Confidence level for bias corrected confidence intervals.
For more information, see the ConfidenceBC method of the AmosEngine class.
Programming
In Amos Graphics programs, you can fill this text box with "95" by using the following statement (Visual Basic):
pd.GetTextBox("AnalysisPropertiesForm", "ConfidenceBCText").Text = "95"