Access Denied Posted September 5, 2011 Report Share Posted September 5, 2011 I am very confused with how you calculate the percent error and what this actually means?please help x Reply Link to post Share on other sites More sharing options...
ILM Posted September 5, 2011 Report Share Posted September 5, 2011 (edited) You can simply calculate the percent error by subtracting the experimental value from the literature value then divide it by the literature value, but pay attention that the value of "subtracting the experimental value from the literature value" is an absolute value so always is positive, then you will multiply it by 100%:Percentage error=|(experimental value-accepted value)/(accepted value)|×100% Edited September 5, 2011 by King inm Glau 1 Reply Link to post Share on other sites More sharing options...
Ice Cream is really yummy Posted September 5, 2011 Report Share Posted September 5, 2011 Also keep in mind that IB gives more freedom with this, gives the teachers more freedom with this. So just check out with your teacher if they use another method, or want your percentage error to be within a certain margin. Reply Link to post Share on other sites More sharing options...
Access Denied Posted September 5, 2011 Author Report Share Posted September 5, 2011 just wondering if this is absolutely necessary I cannot seem to find a literate value for the rate of fermentation in yeast by sugars....thank you Reply Link to post Share on other sites More sharing options...
Procrastination Posted September 5, 2011 Report Share Posted September 5, 2011 There's another method. You take the absolut uncertainty and divide it into the value itself. Then you multiply by 100. And there you have your percentage error.Percentage Error X Value= (Uncertainty/Value)*100 Reply Link to post Share on other sites More sharing options...
ILM Posted September 5, 2011 Report Share Posted September 5, 2011 just wondering if this is absolutely necessary I cannot seem to find a literate value for the rate of fermentation in yeast by sugars....thank youI think that you should ask your teacher, it is good to have a lit. value because by finding %error you can evaluate your lab and see if it contain systematic errors. This information is from an IB moderator: if you don't have a lit. value, the teacher may take the average of the class and give you a lit. value.. Reply Link to post Share on other sites More sharing options...
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