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Social ScienceWhat does it mean when two variables are described as “positively correlated”?
What does it mean when two variables are described as “positively correlated”?
Expert Answer
In statistical analysis to measure the relation between two bivariate data, then if the change of a variable affects a change in the other variable, then this relationship is called correlation.
If the two variable deviate in the same direction, that is if the increase ( or decrease) in one results in a corresponding increase (or decrease) in the other , correlation is said to be positive.
If the two variable deviate in the opposite direction, that is if the decrease ( or increase) in one results in a corresponding increase (or decrease) in the other , correlation is said to be negative.
In order to draw the positive correlation we can use a scatter diagram as follows:
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35 30 25 20 15 10 5 0 0 10 30 40 50 20 LO
In mathematically we can writ...
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Covxy) Υ= σ.σ. Συ-ΣΥΣx γΣΣνΣy-ΣΥ For positive corre lation Covx,y) 0 σ.σ, ΥΞ
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