11. Correlation

When preparing a scatterplot, which variable is typically placed on the horizontal ($x$) axis?

Which of the following best describes the relationship between two variables in a scatterplot that shows points closely clustered around a straight line that slopes upward from left to right?

When examining a scatterplot, how can you determine if there is a relationship between two variables?

Which of the following best describes a scatterplot and its primary use in statistics?

Which of the following scatterplots best shows an outlier in both the $x$- and $y$-direction?

Which of the following scatterplots best illustrates an outlier that is extreme in both the $x$- and $y$-direction?

When comparing the boxplots of two groups, which of the following should be done?

Given several scatterplots, which of the following statements about the calculated correlation coefficient $r$ is correct?

Which type of visualization is most appropriate for evaluating the relationship between two quantitative variables?