Lesson 8 Correlations

Question 1

What are correlations?

Answer 1

Technique for analysing the strength of the RELATIONSHIP between two co-variables

Question 2

What are co-variables?

Answer 2

Quantitative variables

Question 3

Where is the data for a correlation obtained from?

Answer 3

Non-experimental source

E.g. survey

Question 4

What is the strength of a correlation?

Answer 4

Between -1 and 1

Question 5

What does ‘zero’ mean for a correlation coefficient?

Answer 5

No correlation

Question 6

What is the correlation coefficient?

Answer 6

Strength of correlation

Question 7

What are the advantages of correlations?

PIMESM

Answer 7

Predictions can be made about one variable based on knowledge of other

Investigate things that couldn’t be Manipulated Experimentally due to ethics

Allows establishment of Strength of relationship between two variables + Measure it precisely

Question 8

What are the disadvantages of correlations?

CAECRCV

Answer 8

Cannot demonstrate cause and effect

Cannot detect Curvilinear Relationships

Confounding Variable may influence both