Week 3 Quiz

Question 1

Q1: Which statement about Pearson’s correlation is not true?
a. It can be used as an effect size
b. It varies between –1 and +1
c. It measures ordinal rather than linear association
d. It can be used when one variable is binary

Answer 1

c. It measures ordinal rather than linear association

Question 2

Q2: The relationship between two variables, controlling for a third variable’s effect on one of them, is called:
a. Semi-partial correlation
b. Bivariate correlation
c. Point-biserial correlation
d. Partial correlation

Answer 2

a. Semi-partial correlation

Question 3

Q3: The covariance is:
a. An unstandardized version of r
b. A measure of relationship strength
c. Dependent on measurement units
d. All of the above

Answer 3

d. All of the above

Question 4

Q4: Which of the following is a negative correlation?
a. More gambling → more problems
b. Younger people → more impulsivity
c. More impulsivity → more problems
d. Less impulsivity → less gambling

Answer 4

b. Younger people → more impulsivity

Question 5

Q5: Which assumes a strictly linear relationship?
a. Spearman’s correlation
b. Pearson’s correlation
c. Kendall’s correlation
d. None of the above

Answer 5

b. Pearson’s correlation