Final answer:
The 'Configure' phase of the Report designer is where you define the 'Group by' attribute, which allows for the structured organization of data.
Step-by-step explanation:
When working with the Report designer, the phase that allows you to define the Group by attribute is the Configure phase. This is the stage at which you specify how your data will be structured or categorized in the report, grouping similar data together for clarity and organization purposes. In the context of report designing, no table is inherently 'more correct' than another; it depends on the specific needs and goals of your report. Different ways of grouping data can provide various insights. For instance, grouping data by time periods might show trends, while grouping by regions could highlight geographical patterns. You may switch between tables or grouping methods to explore different perspectives or answer different research questions.