Obsidian | Level 7

## Effect cell coding, Problem with the interpretation

Using effect cell coding what is the logit of the person having the large wrist watch?

 Variable Parameter estimate p-value Intercept -0.1310 0.4895 Medium watch 0.2130 0.3087 Small watch 0.6974 0.0047
1 ACCEPTED SOLUTION

Accepted Solutions
Rhodochrosite | Level 12

## Re: Reference cell coding, problem to interpret the estimates

(Large watch) = (Intercept)

6 REPLIES 6
Obsidian | Level 7

## Reference cell coding, problem to interpret the estimates

Using the reference cell coding, What is the logit for the person with a large wrist watch(Logistic regression model)

 Variable Parameter estimate p-value Intercept -1.0415 0.0283 Medium 1.1234 0.0243 Small 1.6078 0.0033
Rhodochrosite | Level 12

## Re: Reference cell coding, problem to interpret the estimates

(Large watch) = (Intercept)

Rhodochrosite | Level 12

## Re: Effect cell coding, Problem with the interpretation

Have you studied Proc LOGISTIC: CLASS Variable Parameterization?

(Large watch) = (Intercept) - (Medium watch) - (Small watch)

Obsidian | Level 7

## Re: Effect cell coding, Problem with the interpretation

How did you get the above equation, please prove it or elaborate?

Thank you!

Rhodochrosite | Level 12

## Re: Effect cell coding, Problem with the interpretation

Have you studied the link I suggested or other resources that you can find by searching (of which there are many)? When you understand the definition of effect coding (or any other coding system), it's just an algebraic problem. I would be happy to address any informed and detailed questions you might have.

That said, different coding systems are just different parameterizations of the same model: regardless of coding, the LSMEANS and differences among LSMEANS are the same. I applaud your interest in understanding coding, but I also encourage you to focus on what might be more important.

Super User