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28 <br /> 1 Slide #10 <br /> Countywide Vertical Equity Analysis <br /> Measures Analyzed <br /> Measures of Variability-dispersion or spread of sales ratios in relation to the mean or median sales ratio <br /> Standard Deviation <br /> Coefficient of Dispersion <br /> Coefficient of Variability <br /> Coefficient of Concontralion <br /> Low measures of variability indicate data ars clustered tightly around the mean,and high measures indicate data are <br /> more spread out <br /> ORANGE COUNTY <br /> 14 <br /> tit)x'I'l i CAROLINA <br /> 2 <br /> 3 <br /> 4 Slide #11 <br /> Neighborhood Level Equity Analysis <br /> Conducted by the Tax Office <br /> - Analyzed all 1,026 Assessment Neighborhoods <br /> • Neighborhoods with five or more sales (minimum threshold for reliability recommended by IAAO) <br /> - Used same equity measures for neighborhoods with five or more sales <br /> Added measure of Price Related Pias(PRR)—measures whether sales ratios are systematically higher,lower or <br /> steady as values increase. <br /> • A negative value indicates regressivity while a positive value indicates progressivity <br /> - 86 neighborhoods outside of statistical measures of equity <br /> Neighborhoods with less than five sales <br /> Granular review of values in neighborhoods with less than five sales <br /> - Looking for inconsistencies, reasonableness <br /> 76 neighborhoods identified for closer review <br /> ,1 <br /> ORANGE COUNTY <br /> NA5 <br /> 6 <br /> 7 <br /> 8 <br /> 9 <br />