Psych 2: Unit 5

Unit 5: Nominal & Ordinal Tests


Outline


5.1       Samples

 •   Most research is based on samples. 
•   Generally, samples represent their populations, and contain sampling errors.


5.2       Sampling Techniques

•   Simple Random Sampling
•   Stratified Random Sampling
•   Proportional Stratified Random Sampling
•   Convenience Sampling


5.3       One-way Chi-square Test

•   Known as a goodness of fit test, and often used in preference studies.
•   Compares observations and expectations.
•   Data must be categorized in one way, and must be nominal or ordinal.
•   Use the table of critical values to determine significance.


5.4       Two-way Chi-square Test

 •   Used for nominal or ordinal data that is categorized in two ways.
•   Same formula and critical values as used in a one-way chi-square.
•   Must first calculate expected values.


5.5       Cramer’s Phi

Used to indicate the strength of the relationship in a two-way chi-square analysis.


Resources

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