correlations

Question 1

What is a correlation?

Answer 1

An association illustrating the strengths and direction between to co-variables

Question 2

What is a scattergram?

Answer 2

• Plotting a correlation on to a scattergram
  -One co-variable on x-axis other on y-axis

Question 3

What are the three types of correlation?

Answer 3

Positive correlation
Negative correlation
Zero correlation

Question 4

What is a positive correlation?

Answer 4

Co-variables rise or fall together

Question 5

What is a negative correlation?

Answer 5

Co-variables rise and the other falls

Question 6

What is a zero correlation?

Answer 6

No relationship between the two variables

Question 7

What are the differences between experiments and correlations?

Answer 7

Experiment = manipulates IV and record DV

Correlation = no manipulation so no cause and effect

Experiment = controls extraneous variables

Correlation = Does not control extraneous variables (maybe a third variable)

Question 8

Strength of correlation:

Answer 8

• Can suggest a future hypothesis
• Economical = less time consuming (don’t have to control the environment)

Question 9

Limitation of correlation:

Answer 9

No cause and effect = intervening variable that explains the relationship

Methods may be flawed in measuring the of variables = low in reliability