An appraiser uses one unadjusted four-year mean price as a current-date market indication despite sharp price movements, without analyzing dates or composition. What is the main concern?
Correct Answer
A) The pooled mean mixes different market conditions with no basis for today
Pooling unadjusted prices from sharply different market conditions can confound interpretation of a current-date price level. Multi-year data may still support descriptive or trend analysis when dates, composition and methods are handled appropriately. Four years is a duration, not a sample count, and age alone does not make a transaction unverifiable or unusable.
Why This Is the Correct Answer
Option A is correct because an unadjusted four-year mean pools prices from sharply different market conditions, giving no supported basis for a current-date indication. Without analyzing sale dates or composition, the average cannot reflect today's price level. Comparable sales should be analyzed for changes in market conditions between their contract dates and the effective date.
Why the Other Options Are Wrong
Option B: Four years of sales is too small a sample to analyze reliably
Option B says four years of sales is too small a sample, but four years is a duration, not a sample count. The problem is mixing market conditions, not sample size.
Option C: Sales older than two years cannot be verified for the analysis
Option C claims sales older than two years cannot be verified, which is not true. Age alone does not make a transaction unverifiable.
Option D: Historical sales cannot be analyzed statistically in any way at all
Option D says historical sales cannot be analyzed statistically at all, which overstates the issue. Multi-year data can support trend or descriptive analysis when dates, composition and methods are handled appropriately.
Old prices need time adjustment
Averaging prices from different market periods without adjusting for time blends yesterday's market with today's.
How to use: Use this when a question describes averaging unadjusted sales across a changing market.
Exam Tip
Watch for distractors that confuse a time span with a sample size; four years is a period, not a count of sales.
Common Mistakes to Avoid
- -Averaging unadjusted sales from a changing market as a current value
- -Confusing a time span with a sample size
- -Assuming older sales cannot be verified or analyzed
Concept Deep Dive
Analysis
This question tests the problem of pooling unadjusted prices across a period of sharp market change. A single four-year mean mixes prices from very different conditions, so it does not represent the current date without analysis of timing and composition. Multi-year data can still be useful when handled properly.
Background Knowledge
Market conditions adjustments account for price changes between a comparable's sale date and the effective date. Pooling unadjusted sales from different periods blends those conditions and can mislead. Trend analysis, time adjustments or restricting to recent sales help address the problem.
Real-World Application
Prices in a market rose sharply over four years. An appraiser who simply averaged all sales from that period would understate current value, so the appraiser instead analyzes the trend and applies supported time adjustments to the comparables.
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