Λ [Two-Stage / GS Designs]

posted by Helmut Homepage – Vienna, Austria, 2014-10-14 15:36 (4271 d 06:51 ago) – Posting: # 13701
Views: 13,229

Dear Detlew,

❝ ❝ require(mvtnorm)

Require or not require, that's the question :cool:.


Oh, I didn’t know that. I assumed that require() attachs a package only if is not already attached.
Should have RTFM, which states: “require is designed for use inside other functions …”

❝ ❝ z <- qmvnorm(1-0.05002333, tail="both.tails", mean=mu, sigma=sigma)$quantile


❝ Another magick number? :-D


Exactly. In Pocock’s paper both z and α’ are rounded (2.178, 0.0294). I had to introduce my magick number in order to end up with 2.178.

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