1. Not finding help here? Sign up for a free 30min tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Percentage error

  1. Sep 25, 2005 #1
    I forgot how to do percentage error, actually I kind of forgot what it is. I do remember multiplying somthg by 100% but i cant remember what i divide b4 that.
     
  2. jcsd
  3. Sep 25, 2005 #2
    In terms of percent error with regards to an accepted value:
    Suppose you measured the atomic molar mass of lithium to be 8 g/mol. The accepted value is 6.94. You take the difference, which is 1.06g/mol, and the percent error is therefore +15.27% ie. 1.06/6.94 * 100%
     
  4. Sep 26, 2005 #3

    HallsofIvy

    User Avatar
    Staff Emeritus
    Science Advisor

    Theoretically, you divide the error by the true value. In practice, you have an error because you don't know the true value! In that case you divide the (estimated error) by the measured value.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?



Similar Discussions: Percentage error
  1. Percentage Errors (Replies: 13)

  2. Percentage error (Replies: 1)

  3. Error percentage (Replies: 5)

Loading...