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Questions and Answers
Which scenario describes precision but not accuracy?
Which scenario describes precision but not accuracy?
- Measurements that are consistently hitting the same point but not the target (correct)
- Measurements that show a wide range of values
- Measurements that are close to the true value
- Measurements that are all over the target area
What defines accuracy in measurements?
What defines accuracy in measurements?
- The consistency of repeated measurements
- The degree of error in measurements
- The closeness of two measurements to each other
- The closeness of a measured value to the true value (correct)
Which person is examples of being neither precise nor accurate based on their arrow shots?
Which person is examples of being neither precise nor accurate based on their arrow shots?
- The person who has arrows consistently close to the target
- The person whose arrows all hit the center
- The person whose arrows are scattered randomly (correct)
- The person whose arrows hit the same spot but away from the center
What happens when measurements are both precise and accurate?
What happens when measurements are both precise and accurate?
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Why is accuracy always desired in measurements?
Why is accuracy always desired in measurements?
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Study Notes
Measurement Concepts
- Measurements should aim for minimal errors, with a focus on precision and accuracy.
- Precision refers to the consistency of measurements, while accuracy indicates how close a measurement is to the true value.
Examples of Precision and Accuracy
- Example 1: The first person hits all arrows at the center, demonstrating both precision and accuracy.
- Example 2: The second person hits arrows in the same spot but not at the center, indicating precision without accuracy.
- Example 3: The third person’s arrows are scattered and far from the target, showing neither precision nor accuracy.
Definitions
- Accuracy: Closeness of a measured value to the actual or true value.
- Precision: Closeness of multiple measurements to one another, regardless of their closeness to the true value.
Importance of Accuracy
- Accuracy is prioritized in measurements to ensure that results are meaningful and reliable. Measured values should consistently approach the true value to enhance validity.
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