Multiple Choice
In the context of scatterplots and correlation, which statement is correct?
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11. Correlation
Scatterplots & Intro to Correlation
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In a psychology study, two variables show a negative correlation. What does this mean?
A
There is no relationship between the two variables; the correlation is exactly 0.
B
One variable causes the other variable to decrease.
C
As one variable increases, the other variable tends to decrease.
D
As one variable increases, the other variable also tends to increase.
Verified step by step guidance1
Understand that correlation measures the strength and direction of a linear relationship between two variables.
Recall that a negative correlation means the two variables move in opposite directions.
Interpret a negative correlation as: when one variable increases, the other variable tends to decrease.
Note that correlation does not imply causation, so it does not mean one variable causes the other to decrease.
Recognize that a correlation of exactly 0 means no linear relationship, which is different from a negative correlation.
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