Correlations Flashcards
Learns all to do with correlations within graphs (12 cards)
What is a correlation?
A similarity between two variables
What are co-variables?
They are the variables we are measuring
Why do we use scattergrams?
It is the simplist way of seeing if co-variables have any correlation
What are the three types of correlation?
Positive, negative and no correlation
What does a positive correlation show?
As one variable increases so does the other
What does a negative correlation show?
As one variable increases the other decreases
What does no correlation show?
This shows that the two variables are completely unrelated to one another
How do we determine how strong the correlation is?
The correlation coefficient
What is the range of the correlation coefficient?
0 - 1
Zero correlation) - (perfect correlation
What are the strengths of using correlations?
Quick
Can’t manipulate variables
Could lead to further investigation
What are the weaknesses of using correlation research?
Can’t find the direction of causation
The third Variable effect
What is the third Variable effect?
This where a third Variable that affects the study was not considered
