Don't have time for it all now? No problem, save it as a course and come back to it later. The Pearson Product-Moment Correlation is one of the measures of correlation which quantifies the strength as well as the direction of such relationship.
This formulation is very useful for two key reasons. First, it tells us the direction of relationship. This enables us to get an idea of the strength of relationship - or rather the strength of linear relationship between the variables.
This measure of correlation has interesting properties:. This is because it is not expressing a quantity, but a relationship between quantities. Pearson's correlation coefficient is independent of change in origin and scale. However, the converse is not true. You may also arrive at this result in error if your variables are not in interval or ratio scale of measurement.
Under such circumstances it is possible that a possibly strong! Check out our quiz-page with tests about:. Retrieved Dec 02, from Explorable. The text in this article is licensed under the Creative Commons-License Attribution 4. You can use it freely with some kind of link , and we're also okay with people reprinting in publications like books, blogs, newsletters, course-material, papers, wikipedia and presentations with clear attribution.
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