Laboratory for Interdisciplinary Statistical Analysis - LISA - Virginia ...

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Laboratory for Interdisciplinary StatisticalAnalysisMixed Models and Random Effects• Mixed Model: A statistical model that has bothrandom effects and fixed effects.• Fixed Effect: Levels of the factor arepredetermined. Random Effect: Levels of thefactor were chosen at random.• The primary focus of the course will be toidentify scenarios where a mixed modelapproach will be appropriate. The concepts willbe explained almost wholly through examplesin SAS or in R.www.lisa.stat.vt.edu
Anne Ryan23
Page 1 and 2: Laboratory for InterdisciplinarySta
Page 3 and 4: Laboratory for Interdisciplinary St
Page 11 and 12: LISA helps VT researchers benefitfr
Page 13 and 14: LISA helps VT researchers benefitfr
Page 15 and 16: How can LISA help?• Formulate res
Page 19 and 20: Introduction to R• R is a free so
Page 21: Laboratory for Interdisciplinary St
Page 25 and 26: Burden of Proof—Obligation to shi
Page 27 and 28: Hypothesis Test: Procedure for exam
Page 29 and 30: State the name of the testing metho
Page 31 and 32: State the hypothesis of interest Th
Page 33 and 34: 1. Left Tailed Hypothesis Test:•
Page 35 and 36: Three Requirements for Stating Hypo
Page 37 and 38: Significance Level: Here we choose
Page 39 and 40: Test Statistic: Compute the test st
Page 41 and 42: Conclusion: Last step of the hypoth
Page 44 and 45: Used to test whether the population
Page 46 and 47: The sample is random. The populatio
Page 48 and 49: A researcher would like to know whe
Page 50: Step 5 Conclusion: Fail to reject
Page 53 and 54: The population means of the two gro
Page 55 and 56: Step 3: Calculate the test statisti
Page 57 and 58: Steps 2-4:JMP Demonstration:Analyze
Page 60 and 61: The paired t-test is used to compar
Page 62 and 63: The sample is random. The data is m
Page 64 and 65: A researcher would like to determin
Page 66: Step 5 Conclusion: There is not evi
Page 69 and 70: The first step is to use the ANOVA
Page 71 and 72: Step 1: We test whether there is ad
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CA B C A BMedical TreatmentCompare
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The mean square for groups, MSG, me
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Step 4: Calculate the p-value. Step
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JMP demonstrationAnalyze Fit Y By
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The p-value of the overall F test i
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LevelDrug CDrug CDrug B- LevelDrug
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No InteractionInteractionImprovemen
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We would like to determine the effe
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The one sample t-test allows us to
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Fisher’s Irises Data (used in one
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