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11 <br /> Performance Measures (continued <br /> • Median Sales Ratio and Coefficient of Dispersion (COD) are used when <br /> calculating PRD. <br /> • NC Department of Revenue provides the standard for Median Sales Ratio <br /> ➢ Standard for Median Sales Ratio: 90% - 110% <br /> • International Association of Assessing Officers (IAAO) provides generally <br /> accepted performace standards for COD and PRD <br /> ➢ Standard Ranges for COD: 5.0 — 25.0 <br /> ➢ Standard for PRD: 0.98 — 1 .03 <br /> ORANGE COUNTY <br /> 9 NORTH CAROLINA <br />