Quiz6c_KEY_Sp11

Quiz6c_KEY_Sp11 - C Name: _KEY_ 28 March 2011 IE330 Spring...

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Name: ________________KEY_______________________ C 28 March 2011 IE330 Spring 2011 Closed book, closed notes, no calculators Quiz #6c For all questions, please refer to the ANOVA output shown below. (From Ogunnaike, B. A. (2010). Random Phenomena: Fundamentals of Probability and Statistics for Engineers . CRC Press: Boca Raton, FL.) Shown below is data presented by Box, G.E.P. & Bisgaard, S. (1987), “The scientific context of quality improvement,” Quality Progress , 22 , 54-61, of an experimental study to determine if the carbon content of carbon-steel springs would alter the percentage of cracks that have plagued the manufacturer. The response is the percentage of springs without any cracks, and the carbon content is either 0.5% or 0.7%. One-way ANOVA: 0.5%, 0.7% Source DF SS MS F P Factor 1 50 50 0.24 0.644 Error 6 1268 211 Total 7 1318 S = 14.53 R-Sq = 3.80% R-Sq(adj) = ______ Individual 95% CIs For Mean Based on Pooled StDev Level N Mean StDev --------+---------+---------+---------+-
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Quiz6c_KEY_Sp11 - C Name: _KEY_ 28 March 2011 IE330 Spring...

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