A correlation coefficient is best characterized as

AA measure of the extent of the relationship between two variables ✓ Correct

BAn index of the causal direction between an independent and a dependent variable

CAn indication that an experimental finding will be replicated by others

DA measure of the likelihood that observed differences are due to chance

Correct answer: (A) A measure of the extent of the relationship between two variables

Explanation

A correlation coefficient measures the extent and direction of the relationship between two variables.

It does not establish causal direction between independent and dependent variables.

It says nothing about whether a finding will be replicated by other researchers.

The chance that observed differences are due to chance is a significance test, not correlation.

Its value ranges from minus one to plus one, with zero meaning no linear relationship.

Correlation alone never proves causation between the two variables.

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