Correlations

A correlation is

• A relationship between variables

• A relationship between an IV and a DV

A positive correlation looks like this

• 
• 
• 

A -0.6 correlation is

• Weak negative

• Strong negative

• Weak positive

• Strong positive

A correlation has

• An IV and a DV

• A lot of variables

• Variables that are not manipulated

• Variables that have no relationship with each other

When the number of dogs in Switzerland increases, the number of people eating butter also increases. This is an example of....

• A positive correlation

• A negative correlation

• A third variable issue

• A spurious correlation

A correlation coefficient is

• A number by which we measure the type and strength of s correlation

• A number by which we measure the cause and effect relationship

• A number by which we measure the manipulation of an IV

• A number by which we measure the DV

High tv watching and high obesity are correlated variables. What could be a third variable?

• Owning a farm

• CO2 poisoning

• Genetics

• Speaking more than 2 languages

Which of the following statements is an example of a positive correlation?

• The more hours you study, the better your performance on your exam

• There is no known relationship between reading and alcoholism

• The more hours you stay awake, the less hours you sleep

• None

There is an increasing amount of violence on TV and violent crimes are also increasing.

This could be because:

a) the violent TV is causing more violent acts, or

b) because society is increasingly violent, more TV shows are depicting this violence.

This is called...

• A third variable issue

• Bidirectional ambiguity

• Spurious correlation

• None of those

To calculate a correlation, we use a...

• Pie chart

• Scatter plot

• Histogram

• BAr chart