Correlation Flashcards

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1
Q

What is a correlation

A

Investigates the association between 2 variables- the 2 variables are called co variables

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2
Q

How do correlations differ between experiments

A

Variables are measured instead of manipulated like in experiments
In correlation only an association is found so no causes and effect relationships found

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3
Q

What is negative correlation

A

As one variable increases the other variable decreases
Has a correlation coefficient of less then 0

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4
Q

What is positive correlation

A

As one variable increases another variable increases
Correlation coefficient of more than 0

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5
Q

What is a zero correlation

A

No relationship found between co variables
Correlation co efficient equal to 0

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6
Q

What is a curvilinear correlation

A

A non linear relationship between co variables

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7
Q

Strengths of correlations

A

Justify further investigation as correlation shows trends in data
Secondary data can be used in correlations which is less time consuming
The procedures in a correlation can be repeated

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8
Q

Weaknesses of correlation

A

Difficult to establish a cause and effect relationship
Correlation is misinterpreted if presented to the public by media

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