The difference between 6mm and 1/4 inch is very small in terms of measurement accuracy and precision. 6mm is slightly larger than 1/4 inch, but the difference is minimal and may not be noticeable in most practical applications. Both measurements are precise and accurate for most everyday purposes.
Imagine a dartboard. An accurate measurement would be analogous to hitting the bulls-eye. While a precise measurement is just the tight clustering of shots.
Precision is how close your measurements are. Accuracy is how close your measurements are to the actual measurement.
Accuracy is a measure of how close to an absolute standard a measurement is made, while precision is a measure of the resolution of the measurement. Accuracy is calibration, and inaccuracy is systematic error. Precision, again, is resolution, and is a source of random error.
The article at the link below should help you get a handle on the subtle differences between accuracy and precision.
Accuracy refers to how close a measured value is to the true value, while precision refers to the consistency of repeated measurements. In other words, accuracy is related to correctness, while precision is related to repeatability. A measurement can be precise but not accurate if the values are consistently off by a certain amount, and it can be accurate but not precise if the values vary widely with each measurement.
''Accuracy is the degree of closeness to true value. Precision is the degree to which an instrument or process will repeat the same value. In other words, accuracy is the degree of veracity while precision is the degree of reproducibility.
Accuracy refers to how close a measurement is to the true or accepted value, while precision refers to how close repeated measurements are to each other. A measurement can be precise but not accurate if it consistently misses the true value by the same amount. Conversely, a measurement can be accurate but not precise if the measurements are spread out but centered around the true value.
Accuracy refers to how close a measured value is to the true or accepted value, while precision refers to how close multiple measurements of the same quantity are to each other. In other words, accuracy indicates the correctness of a measurement, while precision indicates the consistency or reproducibility of measurements.
Both accuracy and precision are important to scientific measurement. I'll try to explain the difference with a couple of illustrations. I should start by saying, sometimes the words are used interchangeably but they shouldn't be. I consider precision to mean resolution. That is how fine/small a reading you can get.Assume an electronic thermometer (digital display) can display answers to the nearest one hundredth of a degree. But, the thermometer isn't able to measure with that accurately. Maybe it's only accurate to the nearest whole degree. In this case the precision is greater than is supported by the accuracy of the device.Now take the opposite case where the thermometer is able to measure temperature accurately to one hundredth of a degree but the instrument can only display whole degrees. In this case the precision does not support the accuracy.Ideally the accuracy and precision of an instrument are the same but often that's not the case.
An accurate answer to a question answers the question. The precision depends on the level of accuracy of the answer.
Precision refers to the consistency of repeated measurements or samples, indicating how close the results are to each other regardless of their proximity to the true value. Accuracy, on the other hand, reflects how close a measurement is to the actual or true value. In sampling, high precision means that repeated samples yield similar results, while high accuracy means that those results are close to the correct value. Ideally, a sampling method should achieve both high precision and high accuracy.
A precise measurement is an exact measurement.How long,how tall how wide. EXAMPLE-12X5X24Precision refers how close measurements of the same thing are to each other. A precise measurement is one that is similar or the same as previous measurements. A precise measurement does not need to be accurate.precise measurements may not be accurate but will agree with each other. Characteristic of precision is low standard deviation. It is not in all cases proof of accuracy though