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Inferential Statistics (2) 11. (Lecture Topics (3 Different (Inferential…
Inferential Statistics (2) 11.
Lecture Topics
3 Different (Inferential Stat.) Tests
used to Estimate the Probability
of our Results given H0 is True
T-test
ANOVA (aka: Variance Analysis)
Chi-Squared
T-Test
if we have:
Small Amount
Observations
2 Groups
Function
used to
Compare 2 (and only 2) Groups
w
Few Observations
Features
used when the
Independent
Variable
Influences 2 Groups
(we have
2 Averages
and Compare them)
Dependent Observations
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Indipendent Observations
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ANOVA
(
ANalysis Of VAriance
)
Variance Analysis
Used
when
we have
More than 2 Groups
Principle
we can take the Variation Observations
and Divide in Different Sources of Variation
Variation
is
Divided
in:
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Generalization
of
T-test
but
Not Disadvantage
of
Type 1 Error
when
N Observation Increase
One-Factor Bewteen-Groups ANOVA
Formula
F = Variation Between Groups /
Variation Within Groups
Distribution
F-Distribution
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