Psych 2: Unit 3

Unit 3: Inferential Statistics


Outline


3.1       Standard Scores (z-scores)

A z-score is an individual score in terms of standard deviations, and indicates percentile rank (see the z-tables).


3.2       Correlation (Pearson)

A correlation indicates strength and direction of the relationship between two variables, does not indicate causation, but allows us to make predictions.


3.3       Coefficient of Determination

Indicates how much variance of one variable can be explained by another variable. If r = 0.84, then r-squared = 0.71, indicating that 71% of the variance of one variable can be explained by the other variable.


3.4       Multiple Correlation

Allows us to use more than one variable to predict another variable.


3.5       Linear Regression

Calculate a regression line to make a precise prediction.


Resources

Lecture
Notes


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Work
Sheet


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Unit
Project


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Exam
Review