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Two-Population Hypothesis Testing (Limited Version) (Two…
Two-Population Hypothesis Testing (Limited Version)
Two-Population Hypothesis Testing
Independent Populations
What it looks like in theory
:
Determining
Test Statistic
to use
if σ's are known:
if Proportion:
if σ’s are unknown, and
can
assume they are equal:
if σ’s are unknown, and
cannot
assume they are equal:
Effect of decreasing dispersion (reduced overlap) on Rejecting Ho
Drivers that increase chance of rejecting Ho
Formal Recap
Examples of Hypotheses
Manipulation to get hypothesized
"difference of means"
value
WORD PROBLEMS:
σ’s unknown, cannot assume they are equal
Example #2
Example #1
Practice Problems
Test for a "Difference of Means"
Independent or Dependent?
Criteria
Examples
Dependent Populations
criteria for dependency of samples
Examples
WORD PROBLEMS
Example #1
Practice Problems
Example #2
"Mean of Differences"
(instead of "difference of means")
Why Dependent samples can provide more power
All Rights Reserved by Brent Marinan & University of Arizona
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