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PSY207
B
Spring 2011
Psychological Statistics
Correlation & Regression
13.1 Introduction to Correlation
13.2 The Pearson correlation
13.3 Hypothesis Testing for Pearson Correlation
13.4 More Considerations
13.5 Introduction to Linear Regression
Correlation
•
Measures
and
describes
a relationship
between two variables.
•
Characteristics of relationships
–
Direction
(negative or positive)
–
Strength
Examples of positive and
negative relationships
Three degrees of
linear relationship
Learning Check
•
A scatterplot shows a set of
data points that are
clustered loosely around a line that slopes down to
the right
. Which of the following values would be
closest to the correlation for these data?
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Correlation & Regression
13.1 Introduction to Correlation
13.2 The Pearson correlation
13.3 Hypothesis Testing for Pearson Correlation
13.4 More Considerations
13.5 Introduction to Linear Regression
Introduction to Linear
Equations and Regression
•
The Pearson correlation measures a linear
relationship between two variables
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 Spring '11
 kim
 Statistics, Regression Analysis, pearson correlation, three degrees

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