Statistics - PSY 200 - Variables, Research Methods, and Measurement 

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Variables

Define, statistics, variables, data, and scores.

Define descriptive and inferential statistics, population vs. sample, parameter vs. statistic. Recognize examples of each.

Recognize why statistics are needed to understand data in the behavioral sciences.

Explain what is meant by a "chance difference".

Distinguish between and be able to recognize examples of:

• Variable vs. constant
• Quantitative vs. qualitative variables
• discrete vs. continuous variables
• independent vs. dependent variables.

Use rules of rounding.
Calculate and distinguish amongX, X², and (X)²

Measurement

Define measurement.

Describe the properties and recognize examples of nominal, ordinal, interval and ratio measurement.