PSYC 3010 Final Exam with answers

PSYC 3010 Final Exam with |\ |\ |\ |\ |\




answers

what do correlation methods tell us? - CORRECT ANSWERS
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✔✔describe direction and strength of relation, allow us to make
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predictions from one variable to another |\ |\ |\ |\ |\




correlational methods help us describe and predict behavior but not
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________ it. - CORRECT ANSWERS ✔✔explain
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the fact that a causal relationship between two variables cannot be
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inferred from the naturally occurring correlation between them
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because of the ever-present possibility of __________________
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___________________ correlation - CORRECT ANSWERS ✔✔third |\ |\ |\ |\ |\



variable problem
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correlation can only tell you whether performance of variables
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_____________ - CORRECT ANSWERS ✔✔co-relate |\ |\ |\ |\




no attempts are made to manipulate/control this study, there is the
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third variable problem - CORRECT ANSWERS ✔✔correlational
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study

,a figure that graphically represents the relation between two
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variables, each dot reflect's a persons relationship between two
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variables - CORRECT ANSWERS ✔✔scatterplot
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what can a scatterplot tell you? - CORRECT ANSWERS ✔✔types of
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relations (linear or curvilinear), direction of relations (positive or
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negative), and estimated strength of relations (weak or medium or
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strong)


curved lines - CORRECT ANSWERS ✔✔Curvilinear
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measures the degree and the direction of the linear relation between
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two variables - CORRECT ANSWERS ✔✔Pearson product moment
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correlation coefficent |\




when high Z scores for X are matched with high Z scores for Y, and
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both are positive or both are negative - CORRECT ANSWERS
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✔✔high positive relationship |\ |\




high Z scored for X are matched with high Z scores for Y; one is
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positive and the other is negative - CORRECT ANSWERS ✔✔high
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negative relationship |\

, positive and negative values of ZxZy cancel each other out, and
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EZxZy becomes a smaller number - CORRECT ANSWERS ✔✔no
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relationship


the Pearson Correlation works best when variables share a
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_________relation - CORRECT ANSWERS ✔✔linear, curvilinear |\ |\ |\ |\ |\




The Pearson Correlation is only designed for two ___________
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variables - CORRECT ANSWERS ✔✔continuous |\ |\ |\ |\




correlation can be misleading in some situations due to certain 4
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factors: - CORRECT ANSWERS ✔✔1. cannot imply causality, "third
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variable problem"
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2. cannot capture curvilinear relations
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3. affected by restricted or truncated ranges
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4. affected by outliers
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-If the range of scores is restricted, then the size of r will be reduced.
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-This is common in behavioral and education research because most
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samples used are college students - CORRECT ANSWERS
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✔✔truncated range |\