Oranges [Two-Stage / GS Designs]

posted by d_labes  – Berlin, Germany, 2015-12-03 14:56 (3357 d 05:40 ago) – Posting: # 15694
Views: 13,173

Dear Helmut,

seems I have spoken Suaheli.

What I meant was:
You perform stage 1 with n1. Only if necessary you perform stage 2 with n2. Thus N(total) isn't always n1+n2 (=100 in your example).
Then the 'expected' total sample size aka 'mean' sample size aka ASN can be calculated via my formula given above.

If it is reasonable to calculate a mean for a variable with only 2 values is left to you. That's the reason why power.2stage.GS() dosn't give back components concerning the sample size 'distribution', unlike the other power.2stage.whatever() functions.

Hope my English was now the better Suaheli :-D.

Regards,

Detlew

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