I googled polychoric and polyserial correlation and found they give us correlation between 2 underlying latent bivariate normal distribution. What information these correlation coefficients give about actual ordinal variables we have.
can we relate chi-square test with polychoric correlation coefficient in terms of information they provide regarding original ordinal variables?
CONTEXT:I am trying to find duplicate columns in a dataset and remove them from our final regression model.
Anand,
Can you say more about the context? If the columns would be exact duplicates that should be handled in the data management step.
If they're not exact but you're concerned with collinearity, just look for very high polychoric/serial correlations in the matrix the way you would with continuous variables.
Pat
Context: we have to clean data before applying regression model. so we want to keep only those variables in our model which adds some value and remove redundant one.
- Badges
- Science topic
- Similar topics
- Mathematics
- Statistics
- Applied Statistics