Aspect | Accuracy | Precision |
Definition | The closeness of measurements to the true value. | The closeness of repeated measurements to each other. |
Focus | How close the measured values are to the actual value. | How consistently the same value is obtained upon repetition. |
Accuracy example: The measured blood pressure values (118/78, 120/80, 122/82, 124/84) are close to the true value (120/80), indicating high accuracy.
Precision example: The measured blood pressure values (136/90, 134/92, 132/90, 134/94) are close to each other, indicating high precision, even though they are not close to the true value (120/80).