GK
CHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Close to the accepted value
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All numbers close to the accepted value and together
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All numbers close together
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None of the above
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Detailed explanation-1: -Precision refers to how close measurements of the same item are to each other. Precision is independent of accuracy. That means it is possible to be very precise but not very accurate, and it is also possible to be accurate without being precise. The best quality scientific observations are both accurate and precise.
Detailed explanation-2: -Measurements are precise when you measure the same item multiple times and the values are close to each other. However, precision tells you nothing about whether the measured values are near to the correct value. Measurements can be close to each other but far from the proper value.
Detailed explanation-3: -In mathematics, precision describes the level of exactness in a number’s digits, such as number 54.6 having precision 1 (one decimal digit). A number with end zeroes ("00") has a negative precision, such as 500 having precision-2, or 4, 000 as precision-3. A whole number (not ending in “0") has precision 0.
Detailed explanation-4: -Precision shows the closeness of two or more measurements that they have to each other. It is certainly different from accuracy. Accuracy refers to the closeness of the measurements related to a specific value.