Flashcards in corellation Deck (3)
What is correlation?
Correlation is a technique for analysing the strength and direction of the relationship between two variables, known in correlation as co-variables.
This will show either a positive, negative or no correlation. This is shown with a rating from 1 to -1 , which mean positive or negative. The closer it is to 0 the more likely there is no correlation.
+) you can establish the strength of a relationship between two variables precisely.
+)Once correlations has been found you can predict about one variable based on the other.
+) you can investigate things that cannot be manipulated in an experiment for ethical or practical reasons.
-)Correlation analysis can not show cause and effect.
-)Even if there is a clear correlation it could be caused by an unknown third variable which affects both
-) Correlation doesn't measure curvilinear relationships only linear relationships, curvilinear relationships are bell curve relationships.