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Two-Population Hypothesis Testing (Two-Population Hypothesis…
Two-Population Hypothesis Testing
Two-Population Hypothesis Testing
Independent Populations
Hypotheses (vs. 1-population)
Similarities
Non-similarities
Constructing Hypotheses: Facebook Example
Write it out
Manipulate to get "Difference of Means"
Generalities
Determining
Test Statistic
to use
if σ's are known:
if σ’s are unknown, and
can
assume they are equal:
if σ’s are unknown, and
cannot
assume they are equal:
if Proportion:
Reduce Overlap to help Reject Ho
Using 2 samples
Independent or Dependent?
Independent
Dependent ("Matched Pairs")
Examples
Nike
Amazon
Novartis
Dependent Populations
Identifying the factor that links the samples
Examples
Example
Finding the "mean of the differences" via matching observations
Example
Independent Populations (Examples)
Proportion
σ’s are unknown, and
cannot
assume equal
σ's are known,
σ’s are unknown, and
can
assume equal
Quiz Review
Sample Q's
Indep: σ's unknown, cannot assume equal
Dependent
Video Review (Word Problems)
Indep: σ's known
Indep:σ's unknown, assume equal
Lecture Notes
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All Rights Reserved by Brent Marinan & University of Arizona
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