Which step helps ensure data accuracy when interpreting a chart or table?

• A. Identify what is being measured
• B. Verify data source
• C. Note trends
• D. Read headings and units

Answer: (B)

Confirming where the data comes from is the step that most directly protects accuracy when interpreting a chart or table. Knowing the source tells you about the reliability, methods, and timeliness of the data, which factors into whether the numbers can be trusted for your interpretation. If the source is questionable, biased, or outdated, the figures may mislead even if you read them carefully. Verifying the data source helps you decide whether to accept the figures at face value, seek corroborating evidence, or note limitations in your conclusions.

Understanding what is being measured clarifies the variable, which is essential for correct interpretation, but it doesn’t by itself ensure the numbers are accurate. Noting trends reveals patterns and directions, yet that doesn’t assess the truthfulness of the data. Reading headings and units helps you read the values correctly, but the correctness of the numbers depends on the quality and provenance of the data itself.