Multiple Choice
If two different variables are not related at all, they probably have a correlation coefficient of which of the following values?
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11. Correlation
Correlation Coefficient
Multiple Choice
Which of the following best describes what it means for two variables to be positively associated?
A
Both variables always have the same value.
B
There is no consistent relationship between the two variables.
C
As one variable increases, the other variable tends to increase as well.
D
As one variable increases, the other variable tends to decrease.
Verified step by step guidance1
Understand the concept of association between two variables: it describes how the values of one variable relate to the values of another variable.
Recognize that a positive association means that when one variable increases, the other variable tends to increase as well, indicating a direct relationship.
Note that 'both variables always have the same value' is too strict and not required for positive association; variables can increase together without being equal.
Identify that 'no consistent relationship' means there is no association, so it does not describe a positive association.
Understand that 'as one variable increases, the other tends to decrease' describes a negative association, which is the opposite of a positive association.
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