Use the following to answer questions :
Figure 1-1 
-Relative to frontier A'E' in Figure 1-1, which of the following points is least efficient?
Definitions:
First Grouping Factor
The primary variable used to categorize or group data points in an analysis or experiment.
4 × 3 Factorial Design
An experimental design method that involves two independent variables, where one has 4 levels and the other has 3 levels, leading to 12 different experimental conditions.
Levels
Distinct values or categories of a categorical variable.
Within-Group Estimate
An analysis focusing on the variation or relationships of variables within a single group.
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