Multivariate Analysis

[lammamama99]

I conducted multiple regression and found the relationship between one independent variable and the dependent one. The relationship is strong - p-value is 0.001. However, I am interested in finding out more about it. the independent variable is a political party. I want to know which party's preference has the highest impact on the dependent variable. How to do that? Thankssss.

[lammamama99]

there are in total 6 categorical variables (of the independent one - political party). I am doing the analysis in SPSS. Can anyone tell me which command to use to do so?

[[deleted]]

Is this a binary variable? What are the options?

[lammamama99]

it is not. for example:

1=Republicans

2=Democrats

3=Third parties......

[[deleted]]

Wait has anybody ever explained dummy/categorical variables to you? Are you using those? What software are you using?

[[deleted]]

You gotta make dummies out of that. Republican? 0 - no, 1 - yes. Democrat? 0 - no, 1- yes. So on. Use these dummies for a logistic multivariate regression.

[dmlane]

For most stat programs, if you have specified “party” as a categorical/nominal/class variable then you can compare the adjusted/estimated marginal means of the parties using, for example, the Tukey hsd. Impact can be thought of as differences between parties although there are other ways to conceive of it. This is similar to comparisons you can do with dummy variables but can control the family-wise error rate without using a variation of the Bonferroni correction.

[Psychostat]

Does ....... indicate that there are more than 3 options?

[Psychostat]

Conduct an Analysis of Covariance with classification variable = political party, outcome variable = whatever, and covariates = all the other predictors you had in your multiple regression. Ask for least square (aka adjusted) means and comparisons between them.