A small correlation may occur if the range of scores on a variable is much smaller than the range of possible scores on the variable. This shows a:

Truncated range

Third variable problem

Small effect size

Coefficient of determination

Which is the correct null hypothesis for a correlation?

H1 : = 0

Ho : 0

Ho : = 0

Ho : = 1

What is (rho)?

the value of a Spearmen correlation

the value of the correlation in the population

the value of a correlation involving three variables

the value of a sample correlation Question at position 12

Pearson r measures a _______ relationship between two variables, that is, a relationship that can be described by a straight line.

standard

linear

causal

curvilinear Question at position 13

When do two variables covary?

when the means are equal

when a change in one variable is related to a consistent change in the other

when the relationship between them is curvilinear

only when they are negatively correlated 2.5 points

Question 14 is unpinned. Click to pin. Question at position 14

Which of the following cannot be established with a correlation coefficient?

size of the relationship

strength of the relationship

direction of the relationship

the cause of the relationship Question at position 15 15 2.5 points

Question 15 is unpinned. Click to pin. Question at position 15

Pearson r measures the _________ and direction of the relationship between two variables.

importance

effect size

degree

cause