From Wikipedia, the free encyclopedia
.^ Keep in mind: Accuracy is how close something is to a "true" value.- Zone Precision and Accuracy - CrossFit Journal 2 February 2010 13:26 UTC journal.crossfit.com [Source type: FILTERED WITH BAYES]
^ How close a reading or setting is to the true value of the number is the measure of the accuracy of the scale.- Sphere Research's Slide Rule Universe - Accuracy vs. Precision 2 February 2010 13:26 UTC www.sphere.bc.ca [Source type: FILTERED WITH BAYES]
^ One is actual measured accuracy.- Sam Wormley's GPS Errors & Estimating Your Receiver's Accuracy 10 September 2009 16:016 UTC www.edu-observatory.org [Source type: Academic]
.^ In this example, the precision or reproducibility of the measurement is 0.0001 g.- ChemLab - Resources - Uncertainty 2 February 2010 13:26 UTC www.dartmouth.edu [Source type: Academic]
^ Precision Precision refers to the repeatability of measurement.- B. Accuracy, Precision, and Uncertainty 2 February 2010 13:26 UTC www.scidiv.bcc.ctc.edu [Source type: FILTERED WITH BAYES]
^ These conditions are called repeatability conditions.- Accuracy, Precision, Mean and Standard Deviation: ICP and ICP-MS Operations 2 February 2010 13:26 UTC www.ivstandards.com [Source type: Academic]
^{[1]} .^ Although the two words can be synonymous in colloquial use, they are deliberately contrasted in the context of scientific method.- Accuracy and precision - Wiki.gis.com 2 February 2010 13:26 UTC wiki.gis.com [Source type: Academic]
^ Although stand-alone ruminal pH measurement systems have been developed, they are in limited use and a thorough validation of these systems is lacking.- An Evaluation of the Accuracy and Precision of a Stand-Alone Submersible Continuous Ruminal pH Measurement System -- Penner et al. 89 (6): 2132 -- Journal of Dairy Science 2 February 2010 13:26 UTC jds.fass.org [Source type: Academic]
^ I think the biggest thing that bothers me is how useful metrics can be used correctly and in context with the purpose for which they are being used.- The Perils of Arbitrary and False Precision - Small Wars Council 2 February 2010 13:26 UTC council.smallwarsjournal.com [Source type: General]
Accuracy indicates proximity of measurement results to the true value, precision to the repeatability or reproducibility of the measurement
.^ The measurements are precise, though not necessarily accurate.- Accuracy and precision - Psychology Wiki 2 February 2010 13:26 UTC psychology.wikia.com [Source type: Academic]
- Accuracy and precision - Wiki.gis.com 2 February 2010 13:26 UTC wiki.gis.com [Source type: Academic]
^ A measurement system or computational method is called valid if it is both accurate and precise .- Accuracy and precision - Psychology Wiki 2 February 2010 13:26 UTC psychology.wikia.com [Source type: Academic]
- Accuracy and precision - Wiki.gis.com 2 February 2010 13:26 UTC wiki.gis.com [Source type: Academic]
^ The results of calculations or a measurement can be accurate but not precise; precise but not accurate; neither; or both.- Accuracy and precision - Psychology Wiki 2 February 2010 13:26 UTC psychology.wikia.com [Source type: Academic]
.^ Can we improve accuracy without improving precision?- Precision, Accuracy, and Resolution 2 February 2010 13:26 UTC www.tutelman.com [Source type: Original source]
^ Efforts were then focused on the factors that could improve the three-mix cycle protocol to produce accuracy and precision results consistent with the 20-mix cycle protocol.- Tutorial : Assay: Accuracy and Precision with Serial Dilution Genetic Engineering & Biotechnology News - Biotechnology from Bench to Business 2 February 2010 13:26 UTC www.genengnews.com [Source type: Academic]
^ It is therefore important that in order to determine the accuracy and precision of sperm counts, novel methodologies need to be explored that reduce human error and that are time effective.- The Precision and Accuracy of Six Different Methods to Determine Sperm Concentration -- Prathalingam et al. 27 (2): 257 -- Journal of Andrology 2 February 2010 13:26 UTC www.andrologyjournal.org [Source type: Academic]
.^ Can we improve accuracy without improving precision?- Precision, Accuracy, and Resolution 2 February 2010 13:26 UTC www.tutelman.com [Source type: Original source]
^ For example, if an experiment contains a systematic error , then increasing the sample size will generally produce more precise results, but they will not necessarily be more accurate.- Accuracy and precision - Wiki.gis.com 2 February 2010 13:26 UTC wiki.gis.com [Source type: Academic]
^ It is therefore important that in order to determine the accuracy and precision of sperm counts, novel methodologies need to be explored that reduce human error and that are time effective.- The Precision and Accuracy of Six Different Methods to Determine Sperm Concentration -- Prathalingam et al. 27 (2): 257 -- Journal of Andrology 2 February 2010 13:26 UTC www.andrologyjournal.org [Source type: Academic]
.^ The measurements are precise, though not necessarily accurate.- Accuracy and precision - Psychology Wiki 2 February 2010 13:26 UTC psychology.wikia.com [Source type: Academic]
- Accuracy and precision - Wiki.gis.com 2 February 2010 13:26 UTC wiki.gis.com [Source type: Academic]
^ A measurement system or computational method is called valid if it is both accurate and precise .- Accuracy and precision - Psychology Wiki 2 February 2010 13:26 UTC psychology.wikia.com [Source type: Academic]
- Accuracy and precision - Wiki.gis.com 2 February 2010 13:26 UTC wiki.gis.com [Source type: Academic]
^ The results of calculations or a measurement can be accurate but not precise; precise but not accurate; neither; or both.- Accuracy and precision - Psychology Wiki 2 February 2010 13:26 UTC psychology.wikia.com [Source type: Academic]
.^ The related terms are bias (non- random or directed effects caused by a factor or factors unrelated by the independent variable ) and error (random variability), respectively.- Accuracy and precision - Wiki.gis.com 2 February 2010 13:26 UTC wiki.gis.com [Source type: Academic]
^ The related terms are bias (non- random or directed effects caused by a factor or factors unrelated by the independent variable ) and error (random variability), respectively .- Accuracy and precision - Psychology Wiki 2 February 2010 13:26 UTC psychology.wikia.com [Source type: Academic]
^ In psychometrics and psychophysics, the term accuracy is interchangeably used with validity and 'constant error', whereas 'precision' is a synonym for reliability and 'variable error' respectively.- Accuracy and precision - Psychology Wiki 2 February 2010 13:26 UTC psychology.wikia.com [Source type: Academic]
.^ The recorded Osiris+ measurements of known static positions were within ±1 mm of the value from the computer controlled platform moving the test object.- Accuracy and precision of an external-marker tracking-system for radiotherapy treatments -- Donovan et al. 79 (946): 808 -- The British Journal of Radiology 2 February 2010 13:26 UTC bjr.birjournals.org [Source type: Academic]
^ Computing Uncertainties in Laboratory Data and Result This section considers the error and uncertainty in experimental measurements and calculated results.- ChemLab - Resources - Uncertainty 2 February 2010 13:26 UTC www.dartmouth.edu [Source type: Academic]
^ The absolute value of the difference between each individual thermodilution and Fick measurement was computed, with the average of these reported as mean error.- Improved accuracy and precision of thermodilution cardiac output measurement using a dual thermistor catheter system -- Lehmann and Platt 33 (3): 883 -- Journal of the American College of Cardiology 2 February 2010 13:26 UTC content.onlinejacc.org [Source type: Academic]
.^ Efforts were then focused on the factors that could improve the three-mix cycle protocol to produce accuracy and precision results consistent with the 20-mix cycle protocol.- Tutorial : Assay: Accuracy and Precision with Serial Dilution Genetic Engineering & Biotechnology News - Biotechnology from Bench to Business 2 February 2010 13:26 UTC www.genengnews.com [Source type: Academic]
- Tutorial : Assay: Accuracy and Precision with Serial Dilution Genetic Engineering & Biotechnology News - Biotechnology from Bench to Business 2 February 2010 13:26 UTC www.genengnews.com [Source type: Academic]
^ Before closing, let me cite an example from the real world -- my bathroom -- that illustrates perfectly the difference between resolution, precision, and accuracy.- Precision, Accuracy, and Resolution 2 February 2010 13:26 UTC www.tutelman.com [Source type: Original source]
^ However, if an instrument is well calibrated, the precision or reproducibility of the result is a good measure of its accuracy.- ChemLab - Resources - Uncertainty 2 February 2010 13:26 UTC www.dartmouth.edu [Source type: Academic]
.^ If a result differs widely from the results of other experiments you have performed, or has low precision, a blunder may also be to blame.- ChemLab - Resources - Uncertainty 2 February 2010 13:26 UTC www.dartmouth.edu [Source type: Academic]
^ However, the 2-cm depth increment used between measurements may not have been small enough to obtain good precision with this probe, which had the smallest height.- Soil Profile Water Content Determination: Sensor Accuracy, Axial Response, Calibration, Temperature Dependence, and Precision -- Evett et al. 5 (3): 894 -- Vadose Zone Journal 2 February 2010 13:26 UTC vzj.scijournals.org [Source type: Academic]
Accuracy versus precision; the target analogy
High
accuracy, but low
precision
High
precision, but low
accuracy
.^ In this study we provide such a comparison and we show that updated probe set definitions have significantly better precision (reproducibility) and accuracy than the original probe set definitions.- BioMed Central | Full text | Improved precision and accuracy for microarrays using updated probe set definitions 2 February 2010 13:26 UTC www.biomedcentral.com [Source type: Academic]
^{.December 2008" style="white-space:nowrap;">[citation needed]} The
analogy used here to explain the difference between accuracy and precision is the target comparison.
^ Accuracy without precision can still be useful.- The Perils of Arbitrary and False Precision - Small Wars Council 2 February 2010 13:26 UTC council.smallwarsjournal.com [Source type: General]
^ What's the difference between Accuracy and Precision ?- Sphere Research's Slide Rule Universe - Accuracy vs. Precision 2 February 2010 13:26 UTC www.sphere.bc.ca [Source type: FILTERED WITH BAYES]
^ Precision and accuracy are completely different concepts.- Precision, Accuracy, and Resolution 2 February 2010 13:26 UTC www.tutelman.com [Source type: Original source]
.^ Returning to our target analogy, error is how far away a given shot is from the bull's eye.- ChemLab - Resources - Uncertainty 2 February 2010 13:26 UTC www.dartmouth.edu [Source type: Academic]
.^ Accuracy is how close to a desired target value a test result is.- EASYCAL� 4.0 Calibration Software FAQ - BrandTech Scientific, Inc - Vacuum Pumps, Dispensers, Pipettes, PCR Plastics, and More 2 February 2010 13:26 UTC www.brandtech.com [Source type: General]
.^ Arrows that strike closer to the bullseye are considered more accurate.- Accuracy vs Precision - Difference and Comparison | Diffen 2 February 2010 13:26 UTC www.diffen.com [Source type: FILTERED WITH BAYES]
- Accuracy and precision - Psychology Wiki 2 February 2010 13:26 UTC psychology.wikia.com [Source type: Academic]
- Accuracy and precision - Wiki.gis.com 2 February 2010 13:26 UTC wiki.gis.com [Source type: Academic]
^ The closer the dart hits to the bullseye, the more accurate the tosses are.- Engineering - Accuracy vs. Precision 2 February 2010 13:26 UTC www.butlercc.edu [Source type: FILTERED WITH BAYES]
- OTBPMaps.com - GPS Accuracy vs. Precision 2 February 2010 13:26 UTC www.otbpmaps.com [Source type: FILTERED WITH BAYES]
^ The closer a system's measurements to the accepted value, the more accurate the system is considered to be so to be it.- Accuracy and precision - Psychology Wiki 2 February 2010 13:26 UTC psychology.wikia.com [Source type: Academic]
.^ For the years 1620 to 1998, Guide relies on actual measured values of Delta_T, which can be assumed to be accurate.- Guide CD-ROM Star Chart accuracy 2 February 2010 13:26 UTC www.projectpluto.com [Source type: FILTERED WITH BAYES]
^ Since truly random error is just as likely to be negative as positive, we can reason that a measurement that has only random error is accurate to within the precision of measurement and the more precise the measurement, the better idea we have of the true value , i.e., there is no bias in the data.- Accuracy, Precision, Mean and Standard Deviation: ICP and ICP-MS Operations 2 February 2010 13:26 UTC www.ivstandards.com [Source type: Academic]
^ In most cases, then, it is fair to consider the departure of these trial values from their average value a measure of our confidence in the "trueness" of our final result.- Statistics & Uncertainty - Quantum Measurement - Union College 2 February 2010 13:26 UTC www1.union.edu [Source type: FILTERED WITH BAYES]
.^ This means that the precision is constant relative to the size of the number.- Floating-Point in C# Part I: Concepts and Formats « C# Help – C# Resources and Community 2 February 2010 13:26 UTC www.csharphelp.com [Source type: Reference]
^ This benchmark has a large number of single precision square root function calls, many of which are in the denominator, such as 1.0/sqrt(rsq11).- HPCwire: Compilers and More: Precision and Accuracy 2 February 2010 13:26 UTC www.hpcwire.com [Source type: FILTERED WITH BAYES]
^ Although this approach would not allow us to determine the accurate numbers of spermatozoa, it would allow comparisons between each of the different methodologies and a determination of the repeatability (precision) of each of them.- The Precision and Accuracy of Six Different Methods to Determine Sperm Concentration -- Prathalingam et al. 27 (2): 257 -- Journal of Andrology 2 February 2010 13:26 UTC www.andrologyjournal.org [Source type: Academic]
.^ Selective availability is expected to be zero mean, but only when averaged over many hours or perhaps days.- Sam Wormley's GPS Errors & Estimating Your Receiver's Accuracy 10 September 2009 16:016 UTC www.edu-observatory.org [Source type: Academic]
^ Reproducibility (of results of measurement) - the closeness of the agreement between the results of measurements of the same measurand carried out under changed conditions of measurement.- Accuracy, Precision, Mean and Standard Deviation: ICP and ICP-MS Operations 2 February 2010 13:26 UTC www.ivstandards.com [Source type: Academic]
^ Repeatability (of results of measurements) - the closeness of the agreement between the results of successive measurements of the same measurand carried out under the same conditions of measurement.- Accuracy, Precision, Mean and Standard Deviation: ICP and ICP-MS Operations 2 February 2010 13:26 UTC www.ivstandards.com [Source type: Academic]
)
.^ Two are close together, but nowhere near the center of the group.- Accuracy Diagnostics 10 September 2009 16:016 UTC www.charm.net [Source type: Original source]
^ While the precision and accuracy with 20 mix cycles is close to a perfect serial dilution, the length of time required might be considered impractical.- Tutorial : Assay: Accuracy and Precision with Serial Dilution Genetic Engineering & Biotechnology News - Biotechnology from Bench to Business 2 February 2010 13:26 UTC www.genengnews.com [Source type: Academic]
- Tutorial : Assay: Accuracy and Precision with Serial Dilution Genetic Engineering & Biotechnology News - Biotechnology from Bench to Business 2 February 2010 13:26 UTC www.genengnews.com [Source type: Academic]
^ The range of standard deviations for predicting M across all metrics was only 1/8 D (0.29-0.42 D), indicating that the precision of all metrics was much the same.- Journal of Vision - Accuracy and precision of objective refraction from wavefront aberrations, by Thibos, Hong, Bradley, & Applegate 2 February 2010 13:26 UTC www.journalofvision.org [Source type: Academic]
.^ The measurements are precise, though not necessarily accurate.- Accuracy vs Precision - Difference and Comparison | Diffen 2 February 2010 13:26 UTC www.diffen.com [Source type: FILTERED WITH BAYES]
- Accuracy and precision - Psychology Wiki 2 February 2010 13:26 UTC psychology.wikia.com [Source type: Academic]
- Accuracy and precision - Wiki.gis.com 2 February 2010 13:26 UTC wiki.gis.com [Source type: Academic]
^ Ear measurements were least accurate and precise.- Accuracy and Precision of Noninvasive Temperature Measurement in Adult Intensive Care Patients -- Lawson et al. 16 (5): 485 -- American Journal of Critical Care 2 February 2010 13:26 UTC ajcc.aacnjournals.org [Source type: Academic]
^ A measurement can be precise but not accurate.- WikiAnswers - What does accuracy and precision mean 2 February 2010 13:26 UTC wiki.answers.com [Source type: General]
- Accuracy Vs Precision - Ask.com 2 February 2010 13:26 UTC www.ask.com [Source type: General]
.^ Accuracy without precision can still be useful.- The Perils of Arbitrary and False Precision - Small Wars Council 2 February 2010 13:26 UTC council.smallwarsjournal.com [Source type: General]
^ Precision is reliable , repeatable measurement.- Precision, Accuracy, and Resolution 2 February 2010 13:26 UTC www.tutelman.com [Source type: Original source]
^ Can we improve accuracy without improving precision?- Precision, Accuracy, and Resolution 2 February 2010 13:26 UTC www.tutelman.com [Source type: Original source]
.^ (Their average position might be an accurate estimation of the bullseye, but the individual arrows are inaccurate.- Accuracy and precision - Psychology Wiki 2 February 2010 13:26 UTC psychology.wikia.com [Source type: Academic]
- Accuracy and precision - Wiki.gis.com 2 February 2010 13:26 UTC wiki.gis.com [Source type: Academic]
^ But a tight grouping far from the bullseye is far preferable to a loose grouping centered around the bulleye--because the precise data can be corrected whereas the inaccurate data cannot be (although it can be averaged).- WikiAnswers - What is the difference between accuracy and precision 2 February 2010 13:26 UTC wiki.answers.com [Source type: General]
^ A promise to implement a new feature next year can be a very accurate estimation while promise to complete it on May 12 is likely to be inaccurate, though very precise.
) See also
circular error probable for application of precision to the science of
ballistics.
Quantifying accuracy and precision
.^ Precision is how close the measurements are to each other.- Difference between Accuracy and Precision - Ask.com 2 February 2010 13:26 UTC www.ask.com [Source type: FILTERED WITH BAYES]
^ The precision with which the accepted value has been measured is not important.- Precision and Accuracy ......... 2 February 2010 13:26 UTC www.worsleyschool.net [Source type: FILTERED WITH BAYES]
^ When you make measurements in science you want them to be both precise and accurate.- Grandinetti-Chem221-Precision And Accuracy 2 February 2010 13:26 UTC www.grandinetti.org [Source type: Academic]
- Grandinetti-General-Chemistry-Measurement-Uncertainty 2 February 2010 13:26 UTC www.grandinetti.org [Source type: Reference]
.^ The anticipated net result would be a degradation of precision and accuracy, particularly with the standard technique, which would further increase the differences found with the dual thermistor and the standard approaches.- Improved accuracy and precision of thermodilution cardiac output measurement using a dual thermistor catheter system -- Lehmann and Platt 33 (3): 883 -- Journal of the American College of Cardiology 2 February 2010 13:26 UTC content.onlinejacc.org [Source type: Academic]
^ However, if an instrument is well calibrated, the precision or reproducibility of the result is a good measure of its accuracy.- ChemLab - Resources - Uncertainty 2 February 2010 13:26 UTC www.dartmouth.edu [Source type: Academic]
^ Standard Deviation [ Back ] A useful and commonly used measure of precision is the experimental standard deviation defined by the VIM as...- Accuracy, Precision, Mean and Standard Deviation: ICP and ICP-MS Operations 2 February 2010 13:26 UTC www.ivstandards.com [Source type: Academic]
.^ For a complete description of uncertainty estimation see the Uncertainty of Measurement pages of the National Institute of Standards and Technology (NIST).- Statistics & Uncertainty - Quantum Measurement - Union College 2 February 2010 13:26 UTC www1.union.edu [Source type: FILTERED WITH BAYES]
^ According to National Institute of Standard's web site on Physical Constants this value is known to be: 299 792 458 m/s -1 .- Statistics & Uncertainty - Quantum Measurement - Union College 2 February 2010 13:26 UTC www1.union.edu [Source type: FILTERED WITH BAYES]
^ For an electronic chart to be considered an ECDIS, it must comply with the performance standards for ECDIS established by the International Maritime Organization (IMO).
.^ This also applies when measurements are repeated and averaged.- Accuracy and precision - Psychology Wiki 2 February 2010 13:26 UTC psychology.wikia.com [Source type: Academic]
- Accuracy and precision - Wiki.gis.com 2 February 2010 13:26 UTC wiki.gis.com [Source type: Academic]
^ In that case, the term standard error is properly applied: the precision of the average is equal to the known standard deviation of the process divided by the square root of the number of measurements averaged.- Accuracy and precision - Psychology Wiki 2 February 2010 13:26 UTC psychology.wikia.com [Source type: Academic]
- Accuracy and precision - Wiki.gis.com 2 February 2010 13:26 UTC wiki.gis.com [Source type: Academic]
^ The LRCpH (1-and 5-min averages) correlation coefficients that accounted for repeated measures (0.98 and 0.97, respectively) were numerically higher than that calculated for the CIpH (0.88; Table 1 ).- An Evaluation of the Accuracy and Precision of a Stand-Alone Submersible Continuous Ruminal pH Measurement System -- Penner et al. 89 (6): 2132 -- Journal of Dairy Science 2 February 2010 13:26 UTC jds.fass.org [Source type: Academic]
.^ The precision has to do with the width of a standard deviation after many repeated measurements.- Precision and Accuracy 2 February 2010 13:26 UTC bettyjeanharmsen.com [Source type: FILTERED WITH BAYES]
^ We will use the term precision to measure the spread of errors relative to each other.- 1.1 Precision and Accuracy | Department of Electrical and Computer Engineering | University of Waterloo 2 February 2010 13:26 UTC ece.uwaterloo.ca [Source type: FILTERED WITH BAYES]
^ The standard error of the mean is a measure of the uncertainty of the mean and depends on the number of results.- ChemLab - Resources - Uncertainty 2 February 2010 13:26 UTC www.dartmouth.edu [Source type: Academic]
.^ Further, the central limit theorem shows that the probability distribution of the averaged measurements will be closer to a normal distribution than that of individual measurements.- Accuracy and precision - Psychology Wiki 2 February 2010 13:26 UTC psychology.wikia.com [Source type: Academic]
- Accuracy and precision - Wiki.gis.com 2 February 2010 13:26 UTC wiki.gis.com [Source type: Academic]
^ As would be expected from the Central Limit Theorem, the acquired data are normally distributed.- Precision and Accuracy 2 February 2010 13:26 UTC www.dspguide.com [Source type: Academic]
^ Unit 19 explains data and information, descriptive and inferential statistics, measures of central tendency, variability, frequency distributions, actual data, and standard deviation.- Films On Demand - Precision, Accuracy, and Tolerance; Working with Statistics; and Working with Probability 2 February 2010 13:26 UTC www.fmgondemand.com [Source type: Reference]
With regard to accuracy we can distinguish:
.