一連のクレジットカード取引における不正行為を検出するためのデータ分析手法としてベンフォードの法則の計画的な使用をレビューする際に、情報システム監査人が検証する必要がある最も重要なのは次のどれですか。
正解:D
Benford's Law analyzes numerical data to detect anomalies based on the frequency distribution of leading digits. For it to be effective, the dataset must follow specific criteria, including consistency in measurement units. If transactions are in different currencies, the leading digits can vary due to currency conversion rates, invalidating the analysis.
* Double Integer Format (Option A):Benford's Law applies to any set of numerical data, not specifically double integers.
* Random Selection of Transactions (Option B):The data set must represent the entire population, not a random selection.
* Limiting Analysis to Standard Deviations (Option C):This is irrelevant to the application of Benford's Law.
Reference:ISACA CISA Review Manual, Job Practice Area 2: Information Systems Audit and Assurance.