Mass appraisal is defined as the systematic appraisal of groups of properties using which of the following?

Mass appraisal is defined as the systematic appraisal of groups of properties using standardized procedures and statistical testing. This approach ensures consistency and accuracy across a large number of properties, allowing assessors to derive values that reflect market conditions without the need for individual appraisals for each property.

Standardized procedures create a framework that ensures all properties are evaluated based on similar criteria, making the process efficient and repeatable. Statistical testing is critical in verifying that the appraisals are statistically valid and relevant, allowing for adjustments based on market trends and ensuring that the valuations are equitable.

Using individual appraisals and estimates is impractical for mass appraisal as it would be time-consuming and resource-intensive. General observations and assessments may provide some insight but lack the rigor and consistency achieved through standardized methods. Market conditions are certainly relevant and must be considered, but they are part of the broader framework that standardized procedures and statistical testing help to evaluate effectively.