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

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For hypothesis testing there are three popularversions of testing◦ Left Tailed Hypothesis Test◦ Right Tailed Hypothesis Test◦ Two Tailed or Two Sided Hypothesis Test32
1. Left Tailed Hypothesis Test:• Researchers are only interested in whetherthe true value is below the hypothesizedvalue.• e.g—H0 vs.H :: 0a0• e.g.– 2. Right Tailed Hypothesis Test:• Researchers are only interested in whetherthe True Value is above the hypothesizedvalue.33
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 23 and 24: Anne Ryan23
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: State the hypothesis of interest Th
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
Page 73 and 74: CA B C A BMedical TreatmentCompare
Page 75 and 76: The mean square for groups, MSG, me
Page 77 and 78: Step 4: Calculate the p-value. Step
Page 79 and 80: JMP demonstrationAnalyze Fit Y By
Page 81 and 82: The p-value of the overall F test i
Page 83:
LevelDrug CDrug CDrug B- LevelDrug
Page 86 and 87:
No InteractionInteractionImprovemen
Page 88 and 89:
We would like to determine the effe
Page 90 and 91:
The one sample t-test allows us to
Page 92 and 93:
Fisher’s Irises Data (used in one
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Laboratory for Interdisciplinary Statistical Analysis - LISA - Virginia ...

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