Group effects EMA [Two-Stage / GS Designs]

posted by ElMaestro  – Belgium?, 2014-10-01 11:31  – Posting: # 13630
Views: 31,081

Hi Mittyri,

» More effects in model mean wider intervals.
» Please correct me if I'm wrong.

That's kind of incorrect.
The more effects you have in your model, the more variation is accounted for by the totality of terms; the residual will decrease as will be residual's degrees of freedom. Therefore the width of the CI tends to shrink.

It may happen that the inclusion of a term apparently does nothing. This is due to the design where some effect may contain the other; in such situation the residual variance, the residual df and the width of the CI remain unaffected. But you will never see the CI widened due to more factors.

Le tits now.

Best regards,
ElMaestro

Complete thread:

Activity
 Admin contact
20,346 posts in 4,274 threads, 1,405 registered users;
online 18 (0 registered, 18 guests [including 6 identified bots]).
Forum time (Europe/Vienna): 05:40 CET

The belief that there is only one truth and
that oneself is in possession of it,
seems to me the deepest root of all
that is evil in the world.    Max Born

The Bioequivalence and Bioavailability Forum is hosted by
BEBAC Ing. Helmut Schütz
HTML5