Which term is used to describe the closeness of the measured value to the standard or true value?
Accuracy
The correct answer is Accuracy.
Accuracy refers to how close a measurement is to the true or accepted value. It indicates the degree of correctness of a measurement. A highly accurate measurement will be very close to the standard or true value. Let's look at why the other options are incorrect:
- Approximate: An approximate value is a close estimation, but it doesn't necessarily specify how close it is to the true value.
- Precision: Precision refers to the reproducibility of a measurement. Highly precise measurements are consistent and close to each other, but they may not be close to the true value. For example, a scale might consistently report a weight that is 1 kg off from the actual weight – high precision, but low accuracy.
- Mean: The mean is the average of a set of measurements. While the mean can be used to estimate the true value, it's not a direct measure of how close a single measurement is to the true value.
Therefore, accuracy is the only term that specifically describes the closeness of a measured value to the standard or true value.
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