Tableau Desktop Foundations Practice Question

The correct method to change the default aggregation for a field is to right-click on the field in the Data pane, navigate to 'Default Properties', and then select the desired aggregation. This action sets the default behavior for the field across the entire workbook for all future uses. Changing the aggregation on a pill in a view only affects that specific instance. Creating a new calculated field is a workaround that creates an entirely new field. The Data Source page is used for managing the data model, not for setting default visualization properties like aggregation.