Correlations:
Scattergram –
Graph that shows correlation between two sets of data
Correlation
coeffi cient –
A measure of the degree of correlation (r)
The number indicates the strength of the relationship, the sign indicates the
direction of the relationship, from -1 to 1
Advantages –
Can establish a relationship between two variables
Can be used when an experiment would be unethical or impractical
Disadvantages –
Cause and effect are not demonstrated
There may be other intervening variables involved
Scattergram –
Graph that shows correlation between two sets of data
Correlation
coeffi cient –
A measure of the degree of correlation (r)
The number indicates the strength of the relationship, the sign indicates the
direction of the relationship, from -1 to 1
Advantages –
Can establish a relationship between two variables
Can be used when an experiment would be unethical or impractical
Disadvantages –
Cause and effect are not demonstrated
There may be other intervening variables involved
