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Comparison of 4 sets of data: a measure of similarity

  1. Apr 16, 2010 #1
    hi,
    i measured the emission spectrum of an LED with a monochromator connected to a PMT tube.
    the spectrum was measured at four different gain levels on the PMT.
    i want to check the PMT's linearity at the different gain level, so i want to compare the four data sets and check their similarity.
    what is a statistically good way to do this?

    thanks for any help
     
  2. jcsd
  3. Apr 19, 2010 #2

    EnumaElish

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