Asked by: Lioba Terbeek
science physics

What is a precise measurement?

9
The precision of a measurement system isrefers to how close the agreement is between repeatedmeasurements (which are repeated under the same conditions).Consider the example of the paper measurements. Theprecision of the measurements refers to the spread ofthe measured values.


Also asked, what is precision measurement?

Precision refers to the closeness of two or moremeasurements to each other. Using the example above, if youweigh a given substance five times, and get 3.2 kg each time, thenyour measurement is very precise. Precision isindependent of accuracy. You can be very precise butinaccurate, as described above.

Also, what is the difference between precision and accuracy? Precision and accuracy are often usedinterchangeably, but in science they have very different meanings.Measurements that are close to the known value are said to beaccurate, whereas measurements that are close to each otherare said to be precise.

what is an example of precision?

Accuracy is how close a value is to its true value. Anexample is how close an arrow gets to the bull's-eye center.Precision is how repeatable a measurement is. Anexample is how close a second arrow is to the first one(regardless of whether either is near the mark).

Why is precise measurement important?

When taking scientific measurements, it isimportant to be both accurate and precise. Accuracyrepresents how close a measurement comes to its true value.This is important because bad equipment, poor dataprocessing or human error can lead to inaccurate results that arenot very close to the truth.

Related Question Answers

Wilver Beovide

Professional

What is the synonym of precision?

Words Related to precision
correctness, fidelity, rightness, strictness, truth.definiteness, definitiveness, definitude, determinacy. subtlety.care, carefulness, fastidiousness, meticulousness,persnicketiness.

Ka Mordasov

Professional

What is accuracy formula?

The accuracy is a measure of the degree ofcloseness of a measured or calculated value to its actual value.The percent error is the ratio of the error to the actual valuemultiplied by 100. Some examples include errors in experimentalreadings and imperfect instrument calibration.

Pancracio Quirk

Professional

What is the SI unit of time?

The base unit for time is the second (theother SI units are: metre for length, kilogram for mass,ampere for electric current, kelvin for temperature, candela forluminous intensity, and mole for the amount of substance). Thesecond can be abbreviated as s or sec.

Yrama Wilt

Explainer

What do you understand by measurement?

In the classical definition, which is standardthroughout the physical sciences, measurement is thedetermination or estimation of ratios of quantities. Quantity andmeasurement are mutually defined: quantitative attributesare those possible to measure, at least inprinciple.

Nayade Carruthers

Explainer

How do you measure accuracy and precision?

The accuracy is a measure of the degree ofcloseness of a measured or calculated value to its actualvalue. The percent error is the ratio of the error to the actualvalue multiplied by 100. The precision of ameasurement is a measure of the reproducibility of aset of measurements.

Marisela Arendsen

Explainer

What is meant by repeatability?

From Wikipedia, the free encyclopedia.Repeatability or test–retest reliability is thecloseness of the agreement between the results of successivemeasurements of the same measure carried out under the sameconditions of measurement.

Otilio Langhandke

Pundit

How can you improve accuracy?

Through experimental method, e.g. fix control variables,choice of equipment. Improve the reliability of singlemeasurements and/or increase the number of repetitions ofeach measurement and use averaging e.g. line of best fit. Repeatsingle measurements and look at difference in values.

Naseer Muralha

Pundit

What do you mean by accuracy of a computer?

accuracy - ComputerDefinition
The accuracy obtained from calculations dependson using bug-free computer chips as well as the quality ofthe input. Contrast with precision, which refers to thenumber of digits, or exactness, in an answer.

Zahraa Rengifo

Pundit

What is a precise statement?

Primary versus Precision statements
A precision statement is a concise; data baseddescription of an existing problem and current status. Because itis based on objective data, a precision statement moves usaway from talking or planning based on subjective, non-measurableproblems.

Berniece Embden

Pundit

What is the difference between reproducibility and repeatability?

repeatability measures the variation inmeasurements taken by a single instrument or person under the sameconditions, while reproducibility measures whether an entirestudy or experiment can be reproduced in its entirety.

Joannes Eikhvald

Pundit

How do you measure accuracy in statistics?

How to Calculate the Accuracy of Measurements
  1. Collect as Many Measurements of the Thing You Are Measuring asPossible.
  2. Find the Average Value of Your Measurements.
  3. Find the Absolute Value of the Difference of Each IndividualMeasurement from the Average.
  4. Find the Average of All the Deviations by Adding Them Up andDividing by N.

Manana Agudoff

Teacher

What is random error in physics?

Random errors are errors of measurementsin which the measured quantities differ from the mean value withdifferent magnitudes and directions.

Virginio Scalise

Teacher

Is accuracy more important than precision?

Accuracy is something you can fix in futuremeasurements. Precision is more important incalculations. When using a measured value in a calculation, you canonly be as precise as your least precise measurement.Accuracy and precision are both important togood measurements in science.

Anesio Mikhalenkov

Teacher

What affects precision and accuracy?

Accuracy refers to how closely the measured valueof a quantity corresponds to its “true” value.Precision expresses the degree of reproducibility oragreement between repeated measurements. The more measurements youmake and the better the precision, the smaller the errorwill be.

Lizbeth Galenkov

Teacher

Which is the closest synonym for the word accurate?

careful, meticulous, precise, deft, reliable,trustworthy, true, correct, exact, well-defined, specific,dependable, skillful, methodical, systematic, discriminative, nice,distinct, particular, well-drawn, realistic, authentic, genuine,close, critical, detailed, factual, severe, rigorous,literal, word-for-word,

Snezana Abaurrea-Abaurrea

Reviewer

What is the similarity between accuracy and precision?

Accuracy vs. Precision. Accuracy andprecision are used in context of measurement. Accuracyrefers to the degree of conformity and correctness of somethingwhen compared to a true or absolute value, while precisionrefers to a state of strict exactness — how consistentlysomething is strictly exact.

Jony Tzschiesche

Reviewer

What are the types of error in measurement?

Generally errors are classified into threetypes: systematic errors, random errors andblunders. Gross errors are caused by mistake in usinginstruments or meters, calculating measurement and recordingdata results.

Vaidotas Farida

Reviewer

Can you be accurate and not precise?

You can be very precise but inaccurate, asdescribed above. You can also be accurate butimprecise. For example, if on average, your measurements for agiven substance are close to the known value, but the measurementsare far from each other, then you have accuracywithout precision.

Nayua Cano

Reviewer

What is precision error?

Explanation: Precision error is randomerror, because It is random error that affectsprecision, of a data.It is also called human error.It can be reduced by taking multiple measurements and averagingthem.

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EveryThingWhat Staff Editor

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14th February, 2020

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