Based on the given article, briefly describe what the procedure is according to elliptic confidence regions is an improve over point estimtes? Fig. 5 Full inferential perceptual mapping model: confidence region ellipses that allow for variances that differ with brand and dimension and covariances that differ with brand descriptive map in Fig. 1 had suggested. Similarly, while the simple map in Fig. 1 had suggested that the other three phonesthe Moto, Samsung, and LGmight all be seen as interchangeable, the reality is slightly more complex. The difference in perceptions regarding design keep the Moto and Samsung distinctthey do not overlap on the vertical (design) dimension. Finally, the brand manager for LG might like that the LG brand seems to have something in common with all three alternative brands, or the overlap with all three may signal a lack of clarity in positioning. Regardless of the brand managers' lessons in this example, it is intended to illustrate that the additional information of different variances and correlations can be extremely beneficial. In the next section, we begin with the familiar individual differences MDS model, INDSCAL, and modify its use by constructing a means of allowing variability to be expressed differentially across