Discrepancy Percent Error
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"sizes" of the things being compared. The comparison is expressed as a ratio and is a unitless number. By multiplying these ratios by 100 they can be expressed as percentages so the terms percentage percent discrepancy vs percent error change, percent(age) difference, or relative percentage difference are also commonly used. The distinction between
Percent Error Standard Deviation
"change" and "difference" depends on whether or not one of the quantities being compared is considered a standard or reference percent error percent yield or starting value. When this occurs, the term relative change (with respect to the reference value) is used and otherwise the term relative difference is preferred. Relative difference is often used as a quantitative
Percent Difference Vs Percent Error
indicator of quality assurance and quality control for repeated measurements where the outcomes are expected to be the same. A special case of percent change (relative change expressed as a percentage) called percent error occurs in measuring situations where the reference value is the accepted or actual value (perhaps theoretically determined) and the value being compared to it is experimentally determined (by measurement). Contents 1 Definitions 2 Formulae 3 percent change difference Percent error 4 Percentage change 4.1 Example of percentages of percentages 5 Other change units 6 Examples 6.1 Comparisons 7 See also 8 Notes 9 References 10 External links Definitions[edit] Given two numerical quantities, x and y, their difference, Δ = x - y, can be called their actual difference. When y is a reference value (a theoretical/actual/correct/accepted/optimal/starting, etc. value; the value that x is being compared to) then Δ is called their actual change. When there is no reference value, the sign of Δ has little meaning in the comparison of the two values since it doesn't matter which of the two values is written first, so one often works with |Δ| = |x - y|, the absolute difference instead of Δ, in these situations. Even when there is a reference value, if it doesn't matter whether the compared value is larger or smaller than the reference value, the absolute difference can be considered in place of the actual change. The absolute difference between two values is not always a good way to compare the numbers. For instance, the absolute difference of 1 between 6 and 5 is more significant than the same absolute difference between 100,000,001 and 100,000,000. We can a
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Calculating Percent Difference In Physics
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How To Find Percent Difference Physics
& Culture Sports Travel Yahoo Products International Argentina Australia Brazil Canada France Germany India Indonesia Italy Malaysia Mexico New Zealand percent difference formula Philippines Quebec Singapore Taiwan Hong Kong Spain Thailand UK & Ireland Vietnam Espanol About About Answers Community Guidelines Leaderboard Knowledge Partners Points & Levels Blog Safety Tips Science & Mathematics Physics Next https://en.wikipedia.org/wiki/Relative_change_and_difference Physics lab question: Percent discrepancy? I have a question regarding understanding the question. It says, calculate the estimated error with the percent discrepancy between the theoretical value and the experimental value. Now, what does that mean? At first, I thought it meant to compare the percent error and the error but that can't possibly be... show more I have a question regarding understanding the question. It https://answers.yahoo.com/question/index?qid=20111110171659AAq1Zp6 says, calculate the estimated error with the percent discrepancy between the theoretical value and the experimental value. Now, what does that mean? At first, I thought it meant to compare the percent error and the error but that can't possibly be right.. Follow 3 answers 3 Report Abuse Are you sure you want to delete this answer? Yes No Sorry, something has gone wrong. Trending Now Tika Sumpter Patti Scialfa Polish in Haiti Taylor Swift American Idol Luxury SUV Deals Batman v Superman 2016 Crossovers Alaska Airlines Credit Cards Answers Relevance Rating Newest Oldest Best Answer: percent discrepancy would be difference between measured value and theoretical value divided by expected value times 100 (to make it a percentage) let t = theoretical value x = experimental value discrepancy = 100(x-t)/t Source(s): John C · 5 years ago 1 Thumbs up 1 Thumbs down Comment Add a comment Submit · just now Report Abuse Percent Discrepancy Source(s): https://shrink.im/a9AFk susann · 7 days ago 0 Thumbs up 0 Thumbs down Comment Add a comment Submit · just now Report Abuse For the best answers, search on this site https://shorturl.im/aIB3F I would interpret it to mean calculate *and compare
of Accuracy Accuracy depends on the instrument you are measuring with. But as a general rule: The degree of accuracy is half a unit each side of the unit of measure Examples: When your instrument measures in "1"s then any value http://www.mathsisfun.com/measure/error-measurement.html between 6½ and 7½ is measured as "7" When your instrument measures in "2"s then any https://www.quora.com/Whats-the-best-way-to-calculate-percent-discrepancy-in-physics value between 7 and 9 is measured as "8" Plus or Minus We can show the error using the "Plus or Minus" sign: ± When the value could be between 6½ and 7½ 7 ±0.5 The error is ±0.5 When the value could be between 7 and 9 8 ±1 The error is ±1 Example: a fence is measured as percent error 12.5 meters long, accurate to 0.1 of a meter Accurate to 0.1 m means it could be up to 0.05 m either way: Length = 12.5 ±0.05 m So it could really be anywhere between 12.45 m and 12.55 m long. Absolute, Relative and Percentage Error The Absolute Error is the difference between the actual and measured value But ... when measuring we don't know the actual value! So we use the maximum possible error. In the vs percent error example above the Absolute Error is 0.05 m What happened to the ± ... ? Well, we just want the size (the absolute value) of the difference. The Relative Error is the Absolute Error divided by the actual measurement. We don't know the actual measurement, so the best we can do is use the measured value: Relative Error = Absolute Error Measured Value The Percentage Error is the Relative Error shown as a percentage (see Percentage Error). Let us see them in an example: Example: fence (continued) Length = 12.5 ±0.05 m So: Absolute Error = 0.05 m And: Relative Error = 0.05 m = 0.004 12.5 m And: Percentage Error = 0.4% More examples: Example: The thermometer measures to the nearest 2 degrees. The temperature was measured as 38° C The temperature could be up to 1° either side of 38° (i.e. between 37° and 39°) Temperature = 38 ±1° So: Absolute Error = 1° And: Relative Error = 1° = 0.0263... 38° And: Percentage Error = 2.63...% Example: You measure the plant to be 80 cm high (to the nearest cm) This means you could be up to 0.5 cm wrong (the plant could be between 79.5 and 80.5 cm high) Height = 80 ±0.5 cm So: Absolute Error = 0.5 cm And: Relative Error = 0.5 cm = 0.00625 80