Lab 11-F2009

Lab 11-F2009 - IE 361 Lab#11/ Analysis of 2 p Factorial and...

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1 IE 361 Lab#11/ Analysis of 2 p Factorial and 2 pq Fractional Factorial Data _____________________ ( N a m e ) An example of a partially replicated 3 2 factorial experiment due originally to R. Snee and appearing in Engineering Statistics by Hogg and Ledolter concerns the effects of the three two-level factors Factor Levels A-Polymer Type Standard ( ) vs New (But Expensive) ( + ) B-Polymer Concentration .01% ( ) vs .04% ( + ) C-Amount of an Additive 2 lb ( ) vs 12 lb ( + ) on the response variable percentage impurity produced y = by a chemical process. Below are Snee's data. Combination y Combination y (1) 1.0 c .9,.7 a 1.0,1.2 ac 1.1 b .2 bc .2,.3 ab .5 abc .5 a) Compute and record the sample means and sample standard deviations for the 8 samples. Combination y s Combination y s (1) c a ac b bc ab abc b) What is an estimate of the standard deviation of percentage impurity that should be associated with any single process set-up (combination of levels of the 3 factors) and its associated degrees of freedom?
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This document was uploaded on 02/11/2012.

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Lab 11-F2009 - IE 361 Lab#11/ Analysis of 2 p Factorial and...

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