0.13. Correlations

Question 1

What does a correlation show?

Answer 1

Correlation shows a relationship between two variables ( whether two things are linked)
-> good starting point in research to see if two things are related

Question 2

What do correlations not show?

Answer 2

Causation -> cannot explain cause and effect

Question 3

How are correlations represented?

Answer 3

On a scattergram/graph

Use crosses, not dots and don’t join up crosses

Question 4

Which variables are not controlled?

Answer 4

Extraneous variables

Question 5

What is a tailed directional hypothesis example?

Answer 5

there will be a positive correlation between height and shoe size

Question 6

What is a tailed non-directional hypothesis example?

Answer 6

there will be a relationship between liking cheese and height

Question 7

What is a linear relationship?

Answer 7

crosses almost always plotted in a line

Question 8

What is a curvlinear relationship?

Answer 8

relationship is curved, usually predictable, such as inverted U

Question 9

Strengths of correlation/scattergram

Answer 9

• allows us to see if 2 variables are related
• easily replicable
• no ethics
• a good starting point prior to further research

Question 10

weaknesses of correlations/scattergram

Answer 10

• only shows a relationship
• does not show causation
• extraneous variables are not controlled