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Sales ComparisonMEDIUM16.4% of exam

When reconciling the adjusted prices of several comparables, why should an appraiser generally avoid a simple arithmetic average?

Correct Answer

A) Because it presumes each adjusted price is equally valid

A simple average presumes the adjusted sale prices have equal validity. Greater weight should go to the most comparable sales, judged by the number and gross amount of adjustments. USPAP does not mandate any formula, including the median.

Answer Options
A
Because it presumes each adjusted price is equally valid
B
Because the average must equal the lowest adjusted price
C
Because averaging is prohibited by USPAP
D
Because the median must be used instead

Why This Is the Correct Answer

Option A is correct because a simple arithmetic average presumes each adjusted price is equally valid. Greater weight generally belongs to the most comparable sales, judged by factors such as the number and gross amount of adjustments.

Why the Other Options Are Wrong

Option B: Because the average must equal the lowest adjusted price

Option B says the average must equal the lowest adjusted price. An average lies within the range of the values and equals the lowest only if all values are the same, so this is mathematically incorrect.

Option C: Because averaging is prohibited by USPAP

Option C says averaging is prohibited by USPAP. USPAP does not prohibit averaging or mandate any particular formula; it requires a credible, supported reconciliation.

Option D: Because the median must be used instead

Option D says the median must be used instead. No standard requires the median, and like a simple average it does not by itself reflect differences in the reliability of each sale.

Average treats all sales equal

A simple average acts as if each comparable is equally good, which is rarely true.

How to use: Use this when asked why simple averaging is avoided in reconciliation.

Exam Tip

Answers that claim USPAP bans or requires a specific formula are usually wrong; the issue is whether the weighting is supported.

Common Mistakes to Avoid

  • -Averaging adjusted prices without considering reliability
  • -Believing USPAP prohibits averaging
  • -Believing the median is required

Concept Deep Dive

Analysis

This question tests why simple averaging is generally avoided in reconciliation. A simple average gives each adjusted sale price equal influence, which assumes they are equally valid, when in practice some comparables are more similar and better supported than others.

Background Knowledge

Reconciliation in the sales comparison approach weighs each adjusted sale price by its reliability and similarity to the subject. Sales needing fewer and smaller adjustments are typically given more weight. The appraiser explains which sales received the most weight and why.

Real-World Application

An appraiser has three adjusted prices, one from a sale needing only minor adjustments and two needing large ones. Rather than averaging, the appraiser places most weight on the least-adjusted sale and explains this in the report.

reconciliationsimple averageequal validityweightingUSPAP
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