11. Correlation

Scatterplots & Intro to Correlation

Multiple Choice
A scatterplot shows that as the values of variable $X$ increase, the values of variable $Y$ also tend to increase. Which of these statements does the graph support?
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Multiple Choice
Which table of paired values $(x, y)$ shows a negative correlation between $x$ and $y$ ?
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Multiple Choice
In the context of a scatterplot and correlation, what does it mean when the slope of a line (or the slope between two points) is undefined?
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Multiple Choice
For the scatter diagram shown here, which of the following best describes the relationship between the two variables if the points form a pattern that slopes upward from left to right?
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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
Which of the following best describes a scatterplot and its primary use in statistics?
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Multiple Choice
In the context of scatterplots, how many variables are typically displayed on a standard scatterplot?
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Multiple Choice
Given a scatterplot showing a positive linear relationship between hours studied and exam scores, which statement is an inference that can be made by using the graph?
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Multiple Choice
In a scatterplot, which of the following Pearson correlation coefficients represents the weakest linear correlation?
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Multiple Choice
In general, which statement about correlation is correct when deciding whether a relationship is causal?
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Multiple Choice
In a scatterplot, which description best represents a strong negative correlation?
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Multiple Choice
In the context of scatterplots, correlation occurs when which of the following is true about two variables?
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Multiple Choice
True or false: If the correlation between two variables is strong, then changes in one variable cause changes in the other (i.e., correlation implies causation).
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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
Given the following correlation coefficients, which value of $r$ would most likely correspond to a scatterplot showing a strong negative linear relationship between two variables?
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