Which Coefficient of Deviation measures the degree of uniformity of one property class against all other classes?

The Segmented Coefficient of Deviation (COD) specifically evaluates the degree of uniformity within one property class compared to all other property classes. This measure is particularly useful because it can highlight differences in assessment quality across various types of properties.

In property tax assessment, ensuring fairness and equity in property valuations is crucial. The Segmented COD allows assessors to identify whether one class of properties—such as residential, commercial, or industrial—has assessments that are more consistent and accurate relative to other classes. A lower Segmented COD would indicate a more uniform assessment within that class compared to others, thus signaling more equitable treatment of properties for tax purposes.

While the other coefficients have their respective applications, they do not focus exclusively on the uniformity of a single property class against all others in this manner. The Stratified COD typically analyzes uniformity within prescribed strata or groups, the General COD considers the overall uniformity of assessments across the entire property spectrum, and the Average COD generally provides a basic assessment of variability without the deep comparative analysis that the Segmented COD offers. Therefore, choosing the Segmented COD in this context is most appropriate for understanding how one specific property class stands relative to others in terms of valuation uniformity.