Interactions


Interactions

Author
Message
CalLadyQED
Forum Guru
Forum Guru (66 reputation)Forum Guru (66 reputation)Forum Guru (66 reputation)Forum Guru (66 reputation)Forum Guru (66 reputation)Forum Guru (66 reputation)Forum Guru (66 reputation)Forum Guru (66 reputation)Forum Guru (66 reputation)

Group: Forum Members
Posts: 62, Visits: 2

I need some help with interactions of dummy variables.

Can I model interactions between two or more qualitative variables like we learned to do interactions between 1 quantitative and qualitative (as in module 14)?

[NEAS: Yes]

If not all the combinations in my data set are present, do they have to be included when I determine the degrees of freedom? For example, I have 5 occupation categories and 3 industry sectors, but not all occupations are present in all sectors. How do I determine the degrees of freedom for occupation * sector? How do I determine degrees of freedom for qualVar1 * qualVar2 * qualVar3? For example, occupation * sector * geographical region.

[NEAS: An interaction is another parameter. Whether there are data points in a class is not relevant; take the number of data points. You may have 100 data points in a class or 0 data points. If no data points exist in a class, there can be no interaction term for that class.]


GO
Merge Selected
Merge into selected topic...



Merge into merge target...



Merge into a specific topic ID...





Reading This Topic


Login
Existing Account
Email Address:


Password:


Social Logins

  • Login with twitter
  • Login with twitter
Select a Forum....











































































































































































































































Neas-Seminars

Search