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Hello,I have an analytical expression E[itex]_{i}[/itex] that I

  1. Dec 16, 2011 #1
    Hello,

    I have an analytical expression E[itex]_{i}[/itex] that I want to fit it to some data E(Ref)[itex]_{i}[/itex] . I fitted this expression for N-points:
    I have calculated the value of chi-squared using the following formula:
    [itex]\chi^{2}[/itex]=[itex]\frac{1}{N-1}\sum_{i=1}^{N}\frac{(E_i-E(Ref)_i)^{2}}{σ_{i}^{2}}[/itex]

    where:
    σ[itex]_{i}[/itex]=error*E(Ref)[itex]_{i}[/itex]

    Normally, I took the error =3-5%, and I got values of [itex]\chi^{2}[/itex]=0.01

    Is this value reasonable? How can we judge on the values of [itex]\chi^{2}[/itex]?

    Thanks in advance.
     
  2. jcsd
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