My sample size is 250. Also would the sample size affect how I do my regression model ?
I can put them all in the model but my question is these categorical variables the have more than 2 categories, should I create a dummy variables for them and all minus one in the model of just put them as...
I am a little noob in statistics and I need your help to run a logistic regression in SPSS for the data that I have.
I have a dichotomous outcome: final vision 20/60 or better and final vision <20/60 vision.
The other variables that I want to fit in the model is: