Search found 3 matches

by tlaba
Fri Aug 14, 2009 5:33 pm
Forum: Support for Ngene Desktop (v1.x)
Topic: Effects coding
Replies: 6
Views: 24798

Effects coding

Hi There,

This might be a stupid question, but are the 0 levels in the NGene design output for effects coded variables the base level (eg: -1) for subsequent data analysis (in Nlogit).

Cheers

Tracey
by tlaba
Thu Jul 02, 2009 5:59 pm
Forum: Support for Ngene Desktop (v1.x)
Topic: Blocking efficient designs
Replies: 2
Views: 9488

Re: Blocking efficient designs

Hey Mike,

Many thanks for this info. Clear as crystal.
Hope you are well

Cheers

Tracey
by tlaba
Thu Jul 02, 2009 12:20 pm
Forum: Support for Ngene Desktop (v1.x)
Topic: Blocking efficient designs
Replies: 2
Views: 9488

Blocking efficient designs

Hi there,

Just wondering if it is theoretically okay to block an efficent design; I have scribbled down from the course that blocking is technically only relevant for orthogonal designs. However for cost and practical reasons I would like to reduce the number of choice sets seen and am reluctant to ...