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Example of distortion in aggregated versus disaggregated results. Annual death rates per 1,000 population, by age, Baltimore city, 1965. 1. Note that whites have a higher overall mortality rate. 2. Yet in each subgroup, whites have a lower mortality rate.
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Example of distortion in aggregated versus disaggregated results.Annual death rates per 1,000 population, by age, Baltimore city, 1965. 1. Note that whites have a higher overall mortality rate 2. Yet in each subgroup, whiteshave a lower mortality rate 3. The paradox arises because of the much higher mortality rates in the 65+ age-group, and because many fewer blacks reach this age, so contribute fewer cases overall. The All Ages data should have been age-standardized.