Considered High Percentage Error
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new iOS app! Snap a picture of your homework & find answers, explanations and videos Get the App or go to Socratic.org/ios on your iPhone Enter your phone number and we'll send you a download link Text me or go to Socratic.org/ios on your iPhone What percent error is too high? Chemistry Measurement negative percentage error Accuracy, Precision, and Percent Error 1 Answer Write your answer here... Start with a one sentence answer Then teach the underlying concepts Don't copy without citing sources How to add symbols & How to write great answers preview ? Answer Write a one sentence answer... Answer: Explanation Explain in detail... Explanation: I want someone to double check my answer Describe your changes (optional) 200 Cancel Update answer 11 Ernest Z. Share Mar 25, 2016 Answer: The acceptability of a percent error depends on the application. Explanation: In some cases, the measurement may be so difficult that a 10 % error or even higher may be acceptable. In other cases, a 1 % error may be too high. Most high school and introductory university instructors will accept a 5 % error. But this is only a guideline. At higher levels of study, the instructors usually demand higher accuracy. Was this helpful? Let the contributor know! Yes Post comment
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the high percentage error of Impedance resistance (Rb or Rct) using Zview software? I am using Zview software to analyzed my impedance data, and after I select the suitable equivalent circuit and obtaining https://www.researchgate.net/post/How_can_I_deal_with_the_high_percentage_error_of_Impedance_resistance_Rb_or_Rct_using_Zview_software a good fitting (please see both Nyquist and Bode plots, attached files) I http://www.ibsurvival.com/topic/18646-percentage-uncertaintiespercentage-error/ found that the barrier resistance has a start value and another end value with high percentage error. So, I don't know exactly what is the value of the barrier resistance (Rb)? And how can I eliminate this error, and Why did I obtain this high percentage error although I have good fitting? Any help please Thanks percentage error in advance Topics Electrochemical Detection × 79 Questions 1,099 Followers Follow Electrochemical Impedance Spectroscopy × 387 Questions 2,372 Followers Follow Electrochemical Engineering × 114 Questions 226 Followers Follow Electrochemical Analysis × 522 Questions 1,378 Followers Follow Electrical Impedance Tomography (EIT) × 5 Questions 21 Followers Follow Electrical Impedance Spectroscopy × 77 Questions 143 Followers Follow Impedance Spectroscopy × 199 Questions 792 Followers Follow Corrosion Testing × 170 Questions 465 considered high percentage Followers Follow Corrosion Science × 259 Questions 897 Followers Follow Corrosion Engineering × 172 Questions 661 Followers Follow Impedance Analysis × 134 Questions 101 Followers Follow Zview × 23 Questions 23 Followers Follow Jan 7, 2015·Modified Jan 7, 2015 by the commenter. Share Facebook Twitter LinkedIn Google+ 0 / 0 Popular Answers Matthew Lacey · Uppsala University The reason is that the equivalent circuit isn't actually suitable and the parallel resistor element shouldn't be there. The plots provided are typical of just a resistance and CPE in series, which fits well. However, a second resistance in parallel with the CPE means that at lower frequency the system should tend towards the real (x-) axis again and show the well-known depressed semicircle shape. This behaviour cannot be seen, and the program can't fit to it - so it ends up regressing to give a resistor with an absurdly high value with a huge error - it's the program's way of saying the element shouldn't be there. You could extend the range of the measurement to include lower frequencies but at the very least the R(RQ) equivalent circuit doesn't fit this data in this range. Jan 8, 2015 Petr Viscor · EIS Laboratory I agree with Mathew that the
Sign in with Twitter Sign Up Forums Files Activity Store Rules Help More All Content All Content This Topic This Forum Advanced Search Facebook Twitter Instagram Home International Baccalaureate Experimental Sciences Chemistry percentage uncertainties/percentage error Archived This topic is now archived and is closed to further replies. percentage uncertainties/percentage error Started by LMaxwell, January 15, 2012 lab LMaxwell unknown_ VIP 137 posts Posted January 15, 2012 Cleared up Share this post Link to post Share on other sites CkyBlue Bag Global Moderator 650 posts Exams: May 2012 Posted January 15, 2012 Rest assure. It is perfectly fine to have percentage error>percentage uncertainty. All that means is that the experiment probably more accurate than precise. I think you already answered your own question Accuracy is how close your experimental value is to your to the literature value, which is measured by %error.Uncertainty is the equal chance of measuring something too high or too low, which is measured by uncertainty/ %unc. Share this post Link to post Share on other sites LMaxwell unknown_ VIP 137 posts Posted January 15, 2012 Rest assure. It is perfectly fine to have percentage error>percentage uncertainty. All that means is that the experiment probably more accurate than precise. I think you already answered your own question Accuracy is how close your experimental value is to your to the literature value, which is measured by %error.Uncertainty is the equal chance of measuring something too high or too low, which is measure by uncertainty/ %unc.But it still means that my experiment was inaccurate right? How would I explain this? Share this post Link to post Share on other sites CkyBlue Bag Global Moderator 650 posts Exams: May 2012 Posted January 15, 2012 In your typical chemistry experiment, a percentage error of 3% is rather small actually, so I wouldn't say it is inaccurate. Percentage error is due to systematic errors within the experiment, which are inherent problems with procedure. Systematic errors cannot be reduced through repeating trials, unlike random error, which is used to explain uncertainty.As for explaining it, that all depends on the experiment. Where do you think the procedure may have led t