The precision and accuracy are terms used in science are to describe the quality of the measurements. They mean different things, and it is sometimes hard to remember who is who. What do they mean and how do you remember who is who.
For example, we will work with the length of nfl jersey
an object. Therefore, measure the length of an object is a decision. Align objects you need to measure with a ruler. Fairs. Move the rule and re-measure the object and purpose. Repeat this process several times. What do you get numbers? Imagine that measures 30mm, 31mm, 30mm, 30mm and my goal. The accuracy is something that you control what I can. Accuracy is my ability, my instrument (the rule) to the same extent to use the same purposes under the same conditions at any time. In the above example, the 30mm in particular measures. Precision is also here on my ability, my measurement tool you use. Accuracy can be learned. The accuracy is under your control. Accuracy, but not under my control at about the same. To say that the object to measure and me with another rule. The new ruler is a different brand and are made of different materials. (They say it is wood instead of plastic.) One of the leaders is 35 years and a leading provider of one year. If I can measure my new job this decision and to obtain various 31mm, 31mm, 31mm and 31.5 mm, I have a very good accuracy. My measurements are very close and I can repeat. However, my numbers are different from this rule. A leader is more accurate than the Pittsburgh Steelers jersey
other. What is it?
Precision is how we the actual measurement with the instrument I received.
Since 1983, a meter was defined as the distance light in a vacuum in 1 / 299, 792.458 seconds. From 1960 to 1983, however, has a counter a different definition. At that time, the definition issued by one meter by the distance of a number of wavelengths of electrons, the transition from one orbit to another Kyrpton (isotope 86) atoms linked.
Regardless of the rule closest to the distance the light in vacuum in 1 / 299, 792.458 seconds is more accurate.
How can you remember which is which?
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