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Posted: September 24th, 2022
GCU PSY520 Week 3 Discussion
GCU PSY520 Week 3 Discussion
PSY520 Graduate
Statistics
Week 3
Discussion
DQ1 Review the video “Linear Correlation” in the
Calculations section of the “Statistics Visual Learner” media piece.
It is sometimes said that the higher the correlation between
two variables, the more likely the relationship is causal. Do you think this is
correct? Discuss.
DQ2 Discuss the strengths and weaknesses of correlational
and regression studies; discuss concepts such as positive and negative
correlations, correlation coefficients, confounding, and causality.
GCU PSY520 Week 7 Discussion
PSY520 Graduate
Statistics
Week 7
Discussion
DQ1 Review the three “Non-parametric” test videos
in the Calculations section of the “Statistics Visual Learner” media
piece.
A researcher is examining preferences among four new flavors
of ice cream. A sample of n = 80 people is obtained. Each person tastes all
four flavors and then picks a favorite. The distribution of preferences is as
follows. Do these data indicate any significance preferences among the four
flavors? Test at the .05 level of significance.
Ice
Cream Flavor
A B C D
12 18 28 22
DQ2 Is it true that parametric tests are generally more
powerful than nonparametric tests? If so, give two reasons why you might choose
to use a nonparametric test instead of a parametric test.
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