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Sales ComparisonMEDIUM16.4% of exam

Which adjustment technique does not require the strict similarity between sales that paired sales analysis does, if an adequate database is available?

Correct Answer

D) Multiple regression analysis

With an adequate database, multiple regression is a valid technique for estimating the contribution of selected elements that does not require the strict similarity between parcels that most other methods need. Rules of thumb are not market derived.

Answer Options
A
Cost analysis based on contractor bids
B
Capitalization of a rent difference
C
Lump-sum adjustment by rule of thumb
D
Multiple regression analysis

Why This Is the Correct Answer

Option D is correct because, if an adequate database of sales is available, multiple regression analysis is a valid technique for estimating the contributory value of selected elements. It does not require the strict similarity between parcels that most other methods need. It handles several differences together by modeling them across many sales.

Why the Other Options Are Wrong

Option A: Cost analysis based on contractor bids

Option A, cost analysis based on contractor bids, is wrong because it measures what a feature costs to build, not the market's reaction across dissimilar sales. It is not the technique described as removing the strict-similarity requirement.

Option B: Capitalization of a rent difference

Option B, capitalization of a rent difference, is wrong because it converts an income difference into a value difference and still depends on comparable rental data. It is not the technique identified as working without strict similarity among sales.

Option C: Lump-sum adjustment by rule of thumb

Option C, a lump-sum adjustment by rule of thumb, is wrong because rules of thumb are not market derived. They do not provide a valid market-based estimate of contribution at all.

Many sales, many variables

Regression trades strict similarity for a large database, letting many sales and many variables do the isolating.

How to use: Use this when asked which technique works without nearly identical sales.

Exam Tip

Link 'adequate database' with regression; link 'nearly identical properties' with paired sales.

Common Mistakes to Avoid

  • -Thinking regression needs nearly identical sales like paired sales
  • -Treating rules of thumb as market-derived support
  • -Confusing cost to build with market contribution

Concept Deep Dive

Analysis

This question tests which adjustment technique can work without nearly identical sales. Paired sales analysis needs sales that differ in only one characteristic. Multiple regression, given an adequate database, can estimate several feature contributions at once without that strict similarity.

Background Knowledge

Common techniques for deriving adjustments include paired sales analysis, statistical analysis such as regression, cost analysis and capitalization of income differences. Paired sales need sales that are alike except for the feature studied. Regression uses a large set of sales to estimate the contribution of several features at once.

Real-World Application

In a large tract-home market, an appraiser cannot find pairs that differ by only one feature. With hundreds of recent sales available, the appraiser runs a regression that estimates GLA, garage and age contributions together. The results support adjustments that paired sales could not isolate.

multiple regressionpaired salesadequate databasecontributory valueadjustment techniques
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