correlations

Question 1

what is a correlation?

Answer 1

technique used to measure the strength and direction of same type of relationship between co-variables

Question 2

what is the difference between correlations and experiments?

Answer 2

• experiements manipulate variables
• experiments determine cause and effect
• correlations look at strength of relationship

Question 3

what is a positive correlation?

Answer 3

• when 1 variable increases another increases

eg caffeine increase= energy increase

Question 4

what is a negative correlation?

Answer 4

when 1 variable increases other variable decreases

eg product price increaes= sales decrease

Question 5

what is no correlation?

Answer 5

when theres no relationship at all between the variables

Question 6

strong correlation coefficients?

Answer 6

negative= -1.0, -0.9, -0.8, -0.7
positive= 0.7, 0.8, 0.9, 1.0

Question 7

moderate correlation coefficients?

Answer 7

negative= -0.4, -0.5, -0.6
positive= 0.4, 0.5, 0.6

Question 8

weak correlation coefficients?

Answer 8

negative= -0.1, -0.2, -0.3
positive= 0.1, 0.2, 0.3

Question 9

directional correlation hypothesis?

Answer 9

states which type of correlation it is

Question 10

non-directional correlation hypothesis?

Answer 10

doesnt state which type of correlation it is, just says there is

Question 11

what is a spurious correlation?

Answer 11

refers to connection between 2 variables that appears to be casual but is not

Question 12

strengths of correlations?

Answer 12

• useful starting tool for research as suggest trends that lead to further research
• measure relationship between variables that cannot be manipulated
• quick and cheap to carry out + no manipulation of variables

Question 13

limitations of correlations?

Answer 13

• can be misused and misinterpreted
• only show how variables related not why= no cause and effect
• interventing variables could be causing relationship between 2 co-variables