Class Meeting 22

Class Meeting 22 - CHEN 3010 Applied Data Analysis Class...

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CHEN 3010 Applied Data Analysis Class Meeting #22 Tuesday, Nov. 16 th Today's Topics Reading for Thursday: pages 286 - 301 Homework #9 posted on the web, due November 18 th ANOVA Results on Tests 2 & 1 Linear Regression ANOVA method Testing Hypotheses & Confidence Intervals in Simple Linear Regression
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Analysis of Variance (ANOVA) Problem 5-57: results on strength of a fiber Entries are tensile strength Test results show variability Analysis of variance addresses the question: How much of the variability in tensile strength results is due to the different levels of % cotton?
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Hypothesis test 012 a 1k l H: H : for at least one k l µµ µ = = = ≠≠ A 0 E MS F MS = ( ) ? 0 ,a 1,n a 1 FF α ⋅− > if yes, reject H 0 , accept H 1 % cotton does have a significant effect on fiber tensile strength ANOVA table (traditional presentation of results)
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Results from EXCEL: Since F >> F crit (and P << alpha), we can reject H0 and accept H1 i.e. Cotton % levels cause a difference in the tensile strength!
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Straight-line Linear Regression Model: Data: { } ii x ,y , i 1, n =
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This note was uploaded on 10/11/2011 for the course CHEN 3010 taught by Professor Kompala,dh during the Spring '08 term at Colorado.

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Class Meeting 22 - CHEN 3010 Applied Data Analysis Class...

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