correlations Flashcards
What is a correlation?
a type of research method or a statistical technique
What is a statistical technique?
a way to measure the strength of a relationship
What does a correlation measure?
the relationship between variables
How does a correlation differ from other research methods?
it measures a relationship rather than a difference
What are the 3 main types of correlation?
- positive
- negative
- no
What is a positive correlation?
an uphill direction and when one variable increases the other also increases
What is a negative correlation?
a downhill direction and when one variable increases but the other decreases
What does it mean when there is no correlation?
when there is no clear trend or direction between variables
How are correlations often represented?
scatter graphs
What is a strength of a scatter graph?
easy to analyse
What do you have to do for the axis of a scatter graph?
operationalise
What do you have to include in the title of a scatter graph?
- include both variables
- ‘a scatter graph graph to show a relationship between’
What should be included on every scatter graph?
a line of best fit
What are the aspects of a line of best fit?
- straight line
- middle of all points
- not touching axis origin
What is the purpose of a line of best fit?
determines the direction and the strength of a correlation
