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How closely a measured value matches the actual value is precision?
Wiki User
∙ 8y ago
You think probable to the accuracy (in the English terminology); and this value is determined exparimentally in each case.
Wiki User
∙ 8y ago
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Explain why significant figures represent the precision of a measurement and not its accuracy?
Significant figures are a way to communicate the precision of a measurement, showing the level of certainty in a number. They indicate the known digits in a measurement plus one estimated digit. Accuracy, on the other hand, refers to how close a measurement is to the true value, which can be affected by systematic errors that can't be corrected by considering significant figures.
Why must the surface coating of Magnesium Oxide be removed prior to determining the mass of magnesium used in the experiment?
The surface coating of Magnesium Oxide can add extra mass to the sample, leading to an inaccurate measurement of the pure magnesium used in the experiment. Removing the coating ensures that only the actual magnesium content is being measured, improving the precision and accuracy of the results.
What is a Systematic?
Systematic error is the difference between the actual value of what is being measured and the value you found. The results of systematic error are precise but not accurate.
What is the difference between Nm3 and Sm3?
Nm3 refers to gas measured at standard conditions of 0 degrees Celsius and 1 atmosphere pressure, while Sm3 refers to gas measured at standard conditions specific to the gas composition being measured. Sm3 takes into account the actual molar composition of the gas, making it more accurate for gas mixtures other than pure nitrogen.
What is the term for the amount of product calculated to be obtained from a given amount of reactant?
The measured of the amount of product obtained from a chemical reaction is called the yield. The yield can be further converted into a percent yield, which is the ratio of the actual yield of the experiment to the theoretical yield multiplied by 100.
If some measurements agree closely but differ widely from the actual value?
Then they have precision but not accuracy.
3 people measure a distance The data is 2.3 mi 2.6 mi 3.1 mi The actual distance is 1.6mi Characterize the collected data in terms of accuracy and precision?
the difference between the true value and the measured values reflects the accuacy achieved. if you want you could work out an average deviation from the true value to reflect this. the precision is determined by how much the measured distances deviate only from each other. so the precision has nothing to do with the true or correct value. so just looking at this problem, it appears that the distances measured were more precise than they were accurate.
Precision is a measure of how close an answer is to the actual or expected?
False
What if actual value - measured value is negative?
Then the measured value is larger than the actual value.
Precision is a measure of how close an answer is to the actual or expected true or false?
false
The closeness of a measurement to its actual value is a measurement is called?
It's signature figures
True or false Precision is a measure of how close an answer is to the actual or expected value?
false
What is precision resistor?
A precision resistor is a resistor that has an actual value that is very close (or precise) to its nominal (or stated value). Therefore, precision resistors have a very degree of accuracy of being very close to their nominal values.
What is the actual of reaction?
The measured amount of product-
How closely a measurement reflects the actual value is what?
llol
What is the equation for accuracy?
%error = (Actual value- Measured value) / actual value *100
The ability to make a measurement that is as close to an actual value is called a...?
The closeness to the actual value is called the accuracy. The reproducibility of the measurement is call the precision.
