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- Path: sparky!uunet!olivea!spool.mu.edu!uwm.edu!linac!att!cbnewsm!cbnewsl!att-out!cbfsb!cbnewsf.cb.att.com!rizzo
- From: rizzo@cbnewsf.cb.att.com (anthony.r.rizzo)
- Newsgroups: sci.math.stat
- Subject: factorial design: Resolution?
- Message-ID: <1993Jan12.172726.7582@cbfsb.cb.att.com>
- Date: 12 Jan 93 17:27:26 GMT
- Sender: news@cbfsb.cb.att.com
- Distribution: na
- Organization: AT&T
- Lines: 23
-
- I'm sure that this is a trivial question for most of you.
- But the answer isn't obvious to me. So, here goes:
-
- I'm doing a factorial experiment, 6 variables at two settings.
- The variables are qualitative, not quantitative.
- According to Box, Hunter, and Hunter, this is a 2^(6-1) half fraction,
- because I'm using 32 runs (on a computer). I've assigned
- the 6th variable to the column for the 12345 interaction.
- Does this make it a resolution VI design? The generator
- is: I = 1 2 3 4 5 6
-
- so that 6 = 1 2 3 4 5
- 1 = 2 3 4 5 6
- 2 = 1 3 4 5 6
- 3 = 1 2 4 5 6
- 4 = 1 2 3 5 6
- and 5 = 1 2 3 4 6
-
- Box, Hunter, and Hunter says that "In general, the RESOLUTION of a
- two-level fractional design is the length of the shortest
- word in the defining relation." Am I interpreting matters correctly?
-
- Tony Rizzo (att.com!hogpb!rizzo)
-