Question

............. is defined as the ability or a system to respond to a true value of a measured variable under reference condition.

• A. Precision
• B. Accuracy
• C. Repetability
• D. Reprodctibility

Hint:

Think of a target board:
- If your arrows hit near the bullseye, your system is accurate.
- If your arrows land closely grouped together but far from the bullseye, your system is precise but not accurate.

Answer 1

The Correct Option is B

Step 1: Understanding the Concept:
Instrument performance characteristics are categorized into static and dynamic properties, defining how well an instrument measures a target parameter.

Step 2: Detailed Explanation:
Let us differentiate between the key measurement parameters:
- Accuracy: The closeness of agreement between the measured value and the true/standard reference value of the variable. This describes the system's ability to represent the true value.
- Precision: The degree of repeatability and agreement among multiple consecutive measurements of the same variable under identical conditions, irrespective of the true value.
- Repeatability: The closeness of agreement between independent test results obtained with the same method on identical test items in the same laboratory by the same operator using the same equipment.
- Reproducibility: The closeness of agreement between test results obtained with the same method on identical test items in different laboratories with different operators using different equipment.

Step 3: Final Answer:
Accuracy is defined as the ability of a system to respond to the true value of a measured variable under reference conditions.