11. Correlation

Correlation Coefficient

객관식
Which of the following scatterplots best represents a dataset with a correlation coefficient $r$ closest to $1$ ?
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객관식
Which value of the correlation coefficient $r$ indicates the strongest linear relationship between two quantitative variables?
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객관식
If the coefficient of determination is $R_{2} = 0.60$ , what is the absolute value of the correlation coefficient $| r |$ ?
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객관식
In a bivariate data set, if the correlation coefficient $r$ is negative, what does this indicate about the relationship between the two variables?
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객관식
Which of the following scatterplots would have a trend line with a negative slope?
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객관식
Which term describes the degree of strength of the linear relationship between $x$ and $y$ ?
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객관식
Which of the following is not a property of the linear correlation coefficient $r$ ?
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객관식
Which of the following is a property of the linear correlation coefficient $r$ ?
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객관식
If you find a correlational relationship between two variables, which of the following statements is correct?
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객관식
Which of the following is not an example of correlation analysis?
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객관식
Height and weight are positively correlated. This means that:
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객관식
In statistics, a correlation coefficient can indicate which of the following about the relationship between two quantitative variables?
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객관식
Given the following correlation coefficients calculated from a dataset, which pair of variables has the strongest correlation? $X$ and $Y$ : $- 0.85$ ; $A$ and $B$ : $0.60$ ; $M$ and $N$ : $- 0.45$ ; $P$ and $Q$ : $0.75$
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객관식
In terms of the Pearson correlation coefficient $r$ , which value represents the weakest linear correlation?
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객관식
Which of the following is an advantage of the $r$ (correlation coefficient) over the $cov$ (covariance) when measuring the relationship between two variables?
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