Definitely statistics is not my cup of tea! I am still uncertain what sigma refers to in this case! I am assuming that sigma_i is just the value I'd read directly from the error bars, and not the actual standard deviation that I have to calculate from the data points. Am I right?
Thank you in...
They are two properties of a celestial object that I need to fit linearly, and the errors propagate from the method of extraction of the values of these properties (e.g. Monte Carlo). I didn't extract the data, I have them ready and since there is some scatter in the data, I thought of doing a...
Hello y'all,
If I have n data points (xi, yi) each with error bars in both x and y (xi_err, yi_err), should I use 1/(xi_err^2+yi_err^2) as the weight in a weighted least squares linear fit, or should the weight be a different value that has nothing to do with error bars? I've never used WLS...