Final Exam EDSTATS

Front

Null Hypothesis

Back

A statement of equality between sets of variables; e.g., there is no difference between variable A and variable B.

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Research Hypothesis

Back

A statement of inequality between sets of variables; e.g., there is a difference between variable A and variable B.

Front

Directional Research Hypothesis

Back

Indicates a difference between groups in one direction.

Front

Directional or Non-directional?

Back

The average score of 9th graders is different from the average score of 12th graders on a memory test.

Front

Directional or Nondirectional?

Back

The average score of 12th graders is greater than 9th graders on a memory test.

Front

Mean

Back

Also known as the arithmetic mean, it is the sum of all the values in a group, divided by the number of values in that group.

Front

Median

Back

The midpoint in a set of scores.

Front

Mode

Back

The value that occurs most frequently.

Front

Ordinal Level of Measurement

Back

What is being measured is ordered.

Front

Nominal Level of Measurement

Back

An outcome that fits into one and only one class or category.