Recent content by Z21Jazz

  1. Z

    Error propagation through a mean

    @hlsmith, So for this example I am measuring a standard that has a known lithium isotope ratio (7Li/6Li). The value in the measurement column is the SIMS instrumental mass fractionation (IMF) in per mille (‰) deviations from the known standard. We measure the standard multiple times before and...
  2. Z

    Error propagation through a mean

    @katxt, Yes, this Monte Carlo simulation does interest me. Please do share the program and the paper. Thanks!
  3. Z

    Error propagation through a mean

    Thank you both for your questions and input. @Miner, Yes every "measurement" value above is the average of a group of averages. Every measurement runs for several cycles in order to get enough ion counts to get a low standard error for the set of cycles. Each cycle is say 15 seconds and the...
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    Error propagation through a mean

    Below is a picture of some fake example data. @Miner, I do not know the true values but I am measuring isotope ratios on an analytical instrument (Secondary Ion Mass Spectrometer). Each measurement has an associated standard error (Error column). I used the equation =IF(Measurement > Mean...
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    Error propagation through a mean

    I have taken 10 measurements and each measurement has it's own associated uncertainty. If I take the mean of these 10 values and I want to know the standard error of the mean, including the uncertainties in the individual measurements, can this be done as follows. For each measurement (n) I...