correlations

Question 1

what is a correlation?

Answer 1

way of establishing whether there is a relationship between 2 variables. We analyse this by drawing a scattergraph.

Question 2

2 types of correlations?

Answer 2

1. positive
2. negative

Question 3

what’s correlation coefficient?

Answer 3

statistical method for assessing strength. number the represents the strength of relationship between 2 variables

Question 4

1?

Answer 4

perfect positive

Question 5

-1

Answer 5

perfect negative

Question 6

0?

Answer 6

no relationship

Question 7

advantages ?

Answer 7

• allows to see strength and relationship
• can be used when variables cannot be manipulated because it would be unethical or not possible

Question 8

disadvantages?

Answer 8

• don’t show cause and effect people often misinterpret relationship and assume cause and effect. this is because there may be other unknown variable that cause both research variables to change.