객관식
Four scatterplots (A–D) are shown. Which plot shows the strongest linear correlation (i.e., has the correlation coefficient with the greatest absolute value)?
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11. Correlation
Scatterplots & Intro to Correlation
객관식
In a scatterplot from a psychology study, what does a negative correlation between two variables indicate?
A
As one variable increases, the other variable tends to decrease.
B
There is no relationship between the variables, so the correlation is exactly 0.
C
One variable causes the other variable to change in the opposite direction.
D
As one variable increases, the other variable tends to increase.
검증된 단계별 안내1
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: when one increases, the other tends to decrease.
Recognize that correlation does not imply causation, so a negative correlation does not mean one variable causes the other to change.
Eliminate options that suggest no relationship (correlation = 0) or that both variables increase together (positive correlation).
Conclude that the correct interpretation of a negative correlation is: as one variable increases, the other variable tends to decrease.
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