What connects a ratio study to the evaluation of model performance?
Correct Answer
D) It compares modelled values against actual prices
Why this is correct: A ratio study is the primary tool for evaluating a mass appraisal model's performance. It statistically compares the model's estimated values (e.g., assessed values) against actual, verified sale prices to measure accuracy (level) and consistency (uniformity). Why the other choices are wrong: It does not confirm a vendor's licensing status. It does not replace random sample testing; it often relies on it. It does not set a confidence score for each estimate; that is a separate model output. Exam tip: Ratio study = model check. Key metrics are median ratio (level) and coefficient of dispersion (uniformity).
Why This Is the Correct Answer
Why this is correct: A ratio study is the primary tool for evaluating a mass appraisal model's performance. It statistically compares the model's estimated values (e.g., assessed values) against actual, verified sale prices to measure accuracy (level) and consistency (uniformity). Why the other choices are wrong: It does not confirm a vendor's licensing status. It does not replace random sample testing; it often relies on it. It does not set a confidence score for each estimate; that is a separate model output. Exam tip: Ratio study = model check. Key metrics are median ratio (level) and coefficient of dispersion (uniformity).
More Emerging Methods Questions
How does an alternative inspection method affect the appraiser's disclosure obligations?
A collector's photographs show a condition the appraiser believes needs specialist assessment. What is the appropriate step?
What responsibility does an appraiser retain for an error originating in a third-party database?
Under current USPAP guidance, what is the output of an automated valuation model before an appraiser analyzes it?
Which assignment type still requires the appraiser to develop an opinion of value?
A model returns an estimate far from the appraiser's own conclusion. What is the appropriate response?
What does it mean that a tool cannot comply with USPAP?
An appraiser is asked to review an assignment where an AVM supplied the value. What does the review examine?
Why is the date a data extract was pulled worth recording in the workfile?
A desktop appraisal is best described as an assignment completed how?
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