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Uncertainty in measurements

  1. Sep 30, 2006 #1
    Hi,

    I just had a quick question in regards to the addition/subtraction of quantaties and their uncertainties.

    Am i correct in saying (22.4mL plusminus .01mL) + (21.3mL plusminus .01mL)=43.7 plusminus .02mL?

    or is it plusminus .01mL ?

    Im pretty sure my first answer is correct just looking for a posative verification, thanks for looking.
     
  2. jcsd
  3. Oct 1, 2006 #2

    Astronuc

    User Avatar

    Staff: Mentor

    Is one familiar with the propagation of uncertainties?

    See - http://www.umd.umich.edu/casl/natsci/slc/slconline/UNC1/index.html [Broken]
    for examples.

    A statistically more accurate method for uncertainties is the sum in quadrature of the uncertaintieso f individual variables.

    http://www.physics.pomona.edu/sixideas/labs/LRM/LR09.pdf [Broken]
     
    Last edited by a moderator: May 2, 2017
  4. Oct 1, 2006 #3
    thanks for the help
     
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