Correlations

Question 1

correlations

Answer 1

look for a relationship between two variables not meaning that one causes the other

Question 2

positive correlation

Answer 2

as one variable increases so does the other variable or as one decreases so does the other

Question 3

negative correlation

Answer 3

as one variable increases another decreases

Question 4

no correlation

Answer 4

variables are said to be uncorrelated

Question 5

correlation coefficient

Answer 5

tells us the strength of a relationship between two variables and refers to a number between -1 and +1 and tells us the direction of the correlation

Question 6

perfect negative correlation

Answer 6

-1.0

Question 7

perfect positive correlation

Answer 7

+1.0

Question 8

strong negative

Answer 8

-0.8

Question 9

strong positive

Answer 9

+0.8

Question 10

weak negative

Answer 10

-0.2

Question 11

weak positive

Answer 11

+0.2

Question 12

no correlation coefficient

Answer 12

0

Question 13

strength of correlations

Answer 13

identify relationships between variables without manipulating behavior so it can be used in situations where experiments would be impossible or un ethical

Question 14

weakness of correlations

Answer 14

cause and effect can’t be established, correlations only show a relationship between variables so we need further research to establish a C&E

Question 15

steps for calculating Spearman’s Rho

Answer 15

1. rank the data from lowest to highest (each variable separate)
2. calculate difference between ranks
3. square the difference between ranks
4. sum the squared differences