Lecture 6

# Lecture 6 - r< 1 correlation s As the value of one...

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1 Correlation Interrelationships of two or more variables The Nature of Correlation s Correlation characterizes the existence of a relationship between variables. s It indicates that two or more variables vary together either positively or negatively. s It indexes the degree of relationship. Correlation Coefficient ( r ) s The statistic that represents the index of the degree of relationship. s The Pearson product-moment correlation or the Pearson s It indexes two properties of a relationship: s Magnitude s -1 < < 1 s Direction s Positive s Negative or inverse

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2 What is a Correlation? s Positive (0 <
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Unformatted text preview: r < 1) correlation: s As the value of one variable increases, the value of the other variable also tends to increase. s Negative (-1 < < 0) correlation: s As one variable increases the other variable has a tendency to decrease. The Interpretation of s Whether it is significant s The value and p value s What is the magnitude s <.20 s .20--.40 s .40--.70 s .70--.90 s >.90 s What is the sign s positive vs. negative Correlations in SPSS s Analyze → Correlate → Bivariate s Pearson s Test of significance s Flag significant correlations...
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Lecture 6 - r< 1 correlation s As the value of one...

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