11. Correlation

Scatterplots & Intro to Correlation

Multiple Choice
In a scatterplot, what does a negative correlation between variables $x$ and $y$ mean?
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Multiple Choice
In a psychology study, two variables show a negative correlation. What does this mean?
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Multiple Choice
Which of the following scatterplots best shows an outlier in only the $x$ -direction?
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Multiple Choice
In the context of scatterplots and correlation, which statement is correct?
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Multiple Choice
Given the following table of values for variables $x$ and $y$ : (1, 2), (2, 4), (3, 6), (4, 8), does the table show a proportional relationship between $x$ and $y$ ?
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Multiple Choice
Given are five observations for two variables, which of the following statements about the scatterplot of the data is most likely to be true?
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Multiple Choice
Given a scatterplot where the points trend upward from left to right, which describes the correlation shown in the scatterplot?
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Multiple Choice
Which of the following scenarios is an example of negative correlation (a downward trend in a scatterplot)?
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Multiple Choice
Which of the following descriptions best represents a strong negative correlation in a scatterplot?
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Multiple Choice
Which of the following best describes a scatterplot and its primary use in statistics?
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Multiple Choice
In introductory psychology statistics, what best describes a negative correlation between two variables when viewed in a scatterplot?
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Multiple Choice
Which type of display is most likely to reveal an association between variables $x$ and $y$ ?
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Multiple Choice
Why is it important to report correlations together with scatter diagrams when analyzing the relationship between two quantitative variables?
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Multiple Choice
A scatterplot of two quantitative variables shows points tightly clustered around a downward-sloping line from left to right. Which statement best describes the correlation shown?
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Multiple Choice
Which of the following best describes the appearance of a scatterplot that shows a strong positive linear relationship between two variables?
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