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PSYCHOLOGY'S STATISTICS

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Terms in this set (10)

The most frequently occurring score or scores in a distribution.

The arithmetic average of a distribution

The middle score in a ranked distribution

The difference between the highest and the lowest scores in a distribution.

Standard Deviation

A computed measure of how much scores vary around the mean score of a distribution.

Normal Distribution

A frequency distribution that is shaped like a symmetrical bell.

Correlation Coefficient

A statistical measure of the strength of the relationship between two variables.

Positive Correlation

As the value of one variable increases (or decreases), the value of the other variable increases (or decreases). A perfect positive correlation is +1.0.

Negative Correlation

As the value of one variable increases, the value of the other variable decreases.
A perfect negative correlation if -1.0.

Zero Correlation

There is no relationship whatsoever between the two variables.