Thank you so much for all your help.
I am using SPSS and I found this website that showed how to do linearity.
Is this correct?
Sorry for the confusion. It has been a difficult concept to explain. Parameter X is something the machine calculates about each person in the study. However, for one of the machines I input Y into the machine and it then calculates parameter X using Y. The other machines does not consider Y...
Excellent! I will use both eyes then.
In extension to this question, would inter-eye correlations be a concern in the following analysis:
I determined the bias comparing machine A with machine B in the calculation for parameter X. I observed a bias trend in my bland altman plots.
I am conducting a research that is comparing two different machines measuring one parameter in people's eyes. I intend to use Bland Altman Plots to make this comparison. However my data set has 115 eyes from 70 people, meaning some individuals have both eyes included. Would I be able to...