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## Homework Statement

I have a function V = kI

where k is some constant

I_err = 0.005 A

V_err = 0.00005 V

A fit was then made, but a problem occurs when I try to calculate the reduced chi^2.

Since the error of the dependent variable V is so small, the resultant reduced chi^2 is fairly large; with good reason because the vertical error bars clearly don't overlap with the fit data.

However, the large error in the independent variable I is large enough to compensate and so the data agrees with the fit within error. If I flip the independent and dependent variables, I get a perfect reduced chi^2. However for the purposes of the fit, it would be strange to do so.

Is there a way to include the independent variable in the calculation for reduced chi^2?

## Homework Equations

The equation I'm using right now is:

chi^2 = sum(((V_exp - V_fit) / V_err)^2)

reduced chi^2 = chi^2/((# of values in V_exp) - (# of parameters))

## The Attempt at a Solution

No attempt thus far except switching independent and dependent variables. Which gives a good reduced chi-squared but is not what I want.