Correlation

Question 1

pearson product moment correlation

Answer 1

used when both variables are continuous

Question 2

spearman’s rho

Answer 2

used when one (or both) variables are ordinal

Question 3

point-biserial correlation

Answer 3

used when one continuous and one ‘truly’ dichotomous variable

Question 4

phi coefficient

Answer 4

used when both variables are true dichotomies

Question 5

pearson’s r

Answer 5

a correlation coefficient caused by the bivariate pearson product moment correlation

Question 6

strength

Answer 6

the closer r is to 1, the stronger the relationship

Question 7

direction

Answer 7

negatively or positively related

Question 8

spurious correlation

Answer 8

a statistical relationship between two variables that is actually caused by a third variable, not by a direct causal relationship between the two variables themselves