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» OCW Home » Epidemiology and Biostatistics » Lectures 
Lecture 8: Inferential Statistics II
Author: Alice Tang, Ph.D.
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Lecture 8 - Introduction Slide Lecture 8 - Introduction Slide
Example: Blood Pressure in Medical Students Example: Blood Pressure in Medical Students
Example, cont. Example, cont.
Concepts Illustrated by Example Concepts Illustrated by Example
Hypothesis Hypothesis
Parameters vs. Statistics Parameters vs. Statistics
Statistic and Parameter Statistic and Parameter
Hypothesis Testing and Statistics Hypothesis Testing and Statistics
Skipping ahead….. Skipping ahead…..
P-value P-value
Remember… Remember…
Results Results
Type I and Type II error Type I and Type II error
Example 2: B-vitamins for reducing risk of recurrent stroke Example 2: B-vitamins for reducing risk of recurrent stroke
Bell Curve 1 Bell Curve 1
Bell Curve 2 Bell Curve 2
Bell Curve 3 Bell Curve 3
Bell Curve 4 Bell Curve 4
Bell Curve 5 Bell Curve 5
Bell Curve 6 Bell Curve 6
Four Possible Outcomes to a Hypothesis Test Four Possible Outcomes to a Hypothesis Test
Hypothesis Hypothesis
Results Results
Conclusions Conclusions
More on confidence intervals More on confidence intervals
Rejection Region 1 Rejection Region 1
Relationship between P value and Confidence Intervals Relationship between P value and Confidence Intervals
Rejection Region 2 Rejection Region 2
Rejection Region 3 Rejection Region 3
Null values Null values
Take-home points Take-home points
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