Can Percent Error Have A Zero Value
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here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the company Business can percent error be negative Learn more about hiring developers or posting ads with us Mathematics Questions Tags Users can percent error be over 100 Badges Unanswered Ask Question _ Mathematics Stack Exchange is a question and answer site for people studying math at any level and can percent error be negative in chemistry professionals in related fields. Join them; it only takes a minute: Sign up Here's how it works: Anybody can ask a question Anybody can answer The best answers are voted up and rise to the top How percent error calculator to calculate relative error when true value is zero? up vote 10 down vote favorite 3 How do I calculate relative error when the true value is zero? Say I have $x_{true} = 0$ and $x_{test}$. If I define relative error as: $\text{relative error} = \frac{x_{true}-x_{test}}{x_{true}}$ Then the relative error is always undefined. If instead I use the definition: $\text{relative error} = \frac{x_{true}-x_{test}}{x_{test}}$ Then the relative error is always 100%. Both methods seem useless.
Percent Error Formula
Is there another alternative? statistics share|cite|improve this question asked Feb 15 '14 at 22:41 okj 9461818 1 you need a maximum for that.. –Seyhmus Güngören Feb 15 '14 at 23:06 1 Simple and interesting question, indeed. Could you tell in which context you face this situation ? Depending on your answer, there are possible alternatives. –Claude Leibovici Feb 16 '14 at 6:24 1 @ClaudeLeibovici: I am doing a parameter estimation problem. I know the true parameter value ($x_{true}$), and I have simulation data from which I infer an estimate of the parameter ($x_{test}$). I want to quantify the error, and it seems that for my particular case relative error is more meaningful than absolute error. –okj Feb 17 '14 at 14:05 1 What about $\text{error} = 2 \frac{x_{true}-x_{test}}{x_{true}+x_{test}}$ if it is for an a posteriori analysis ? –Claude Leibovici Feb 17 '14 at 14:16 1 @okj. I am familiar with this situation. Either use the classical relative error and return $NaN$ if $x_{true}=0$ either adopt this small thing. It is always the same problem with that. You also can add a translation to the $x$'s to get rid of this. –Claude Leibovici Feb 17 '14 at 15:40 | show 4 more comments 4 Answers 4 active oldest votes up vote 5 down vote acce
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Percent Error = 0
& Government Pregnancy & Parenting Science & Mathematics Social Science Society & Culture percent error when theoretical value is zero Sports Travel Yahoo Products International Argentina Australia Brazil Canada France Germany India Indonesia Italy Malaysia Mexico New Zealand Philippines Quebec Singapore percent error when actual value is zero Taiwan Hong Kong Spain Thailand UK & Ireland Vietnam Espanol About About Answers Community Guidelines Leaderboard Knowledge Partners Points & Levels Blog Safety Tips Science & Mathematics Mathematics Next Percent error when the true http://math.stackexchange.com/questions/677852/how-to-calculate-relative-error-when-true-value-is-zero value is 0? The formula for calculating percent error is (estimated value - true value) / true value * 100. My estimated value is 0.1 while the true value is 0, which would give me (0.1 - 0) / 0 * 100. Since dividing by 0 is impossible, how can i find the percent error? Thank you!! 1 following 4 answers 4 Report Abuse Are you sure you https://answers.yahoo.com/question/index?qid=20091020201824AAD8K12 want to delete this answer? Yes No Sorry, something has gone wrong. Trending Now Adam Levine Karl Lagerfeld Georgia Lottery Val Chmerkovskiy Lena Headey iPhone 7 Toni Braxton Contact Lenses Free Credit Report LeBron James Answers Relevance Rating Newest Oldest Best Answer: There isn't one in this case. Percent error is undefined when the denominator is zero. It's just a case where the concept of percent error isn't useful. Source(s): elifino · 7 years ago 0 Thumbs up 1 Thumbs down Comment Add a comment Submit · just now Asker's rating Report Abuse Certainly you end up dividing by zero, you cannot calculate percent error when the true value is zero. I think the idea is that you should have any error when measuring a quantity of zero. It's hard to make a measurement mistake if you have zero of the unit! To be honest, I had never considered this before, so thank you! Tim · 7 years ago 0 Thumbs up 0 Thumbs down Comment Add a comment Submit · just now Report Abuse it is normally going to be a low percent error under those circumstances. Normally the methods of measurement are in the text book. 3012345678 · 7 ye
Celebrations Home & Garden Math Pets & Animals Science Sports & Active Lifestyle Technology Vehicles World View www.reference.com Math Numbers Q: Can percent error be a negative number? A: Quick Answer Percent error https://www.reference.com/math/can-percent-error-negative-number-367cee25ac338cc4 can be a negative number. In some cases a positive percent error is typical, but applications such as chemistry frequently involve negative percent errors. Continue Reading Keep Learning What is a number pattern finder? How do you write numbers in expanded form? What are some printable charts for numbers? Credit: Fuse N/A Getty Images Full Answer Percent error is useful in experiments and calculations involving known values; percent error it provides a means of ascertaining the accuracy of calculations. Determining percent error is simple; subtracting the actual value from the experimental value, dividing by the actual value and multiplying the entire product by 100 yields percent error. A percent error of zero indicates that an experimental value is exactly the same as the actual, accepted value. Percent errors are often positive with the difference between experimental can percent error and actual results being an absolute value. This is the case when it is important to determine error, but the direction of the error makes no difference. In some situations, however, the direction of the deviation is important. Chemistry, and some other sciences, maintain negative percent error values. For instance, a given reaction between two substances may have a previously published final yield. It is important for any scientists performing this reaction to report on its accuracy. It is also important to know the direction of the error. A positive percent error means that the reaction had a higher-than-expected yield while a negative error indicates a lower yield. Learn more about Numbers Sources: chemistry.about.com astro.physics.uiowa.edu en.wikipedia.org Related Questions Q: Is 21 a prime number? A: The number 21 is not a prime number. Prime numbers are numbers greater than one that are evenly divisible by only 1 and themselves. As the number 21 has mu... Full Answer > Filed Under: Numbers Q: Is 47 a prime number? A: The number 47 is a prime. That means that its only positive factors are itself and 1. In other words, it cannot be divided evenly by any other numbers.... Full Ans