![]() A positive correlation exists when one variable decreases as the other variable decreases, or one variable increases while the other increases. Positive correlation is a relationship between two variables in which both variables move in tandem-that is, in the same direction. If the dots are concentrated around a line, the relationship is strong. If the dots are widely spread, the relationship between variables is weak. Strength refers to the degree of “scatter” in the plot. How do you describe the strength of a scatter plot? The association can be strong (very little scatter compared to the movement in the trend) or weak (lots of scatter around the trend). Statisticians say two variables are associated if there is if there is a pattern in the scatterplot that is too strong to be likely to arise simply by chance. What is a strong association on a scatter plot? 20 Which correlation coefficient shows the strongest relationship?.16 What does a correlation of 0.25 mean?.12 How do you interpret a correlation coefficient?.11 What does it mean if a correlation is not significant?.10 What does it mean when correlation is significant at the 0.01 level?.9 How do you know if a relationship is linearly significant?.8 How do you interpret a correlation between two variables?.7 How do you interpret a negative correlation?.6 What is a strong positive correlation?.5 What is an example of zero correlation?.2 How do you describe the strength of a scatter plot?.1 What is a strong association on a scatter plot?.
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