I have to calculate the inter-agreement rate using cohen's kappa. However, I only know how to do it with two observers and two categories of my variable.
My task now is this:
I have a set of tweets. Each tweet should be rated as positive/negative/neutral by two observers, thus I have two observers yet 3 categories.
How should the formula of this look like?
Best Answer
I find this document taken from this refresher on Bivariate Statistics Hand-Computation Cache from the University of Nebraska–Lincoln to be clear: