Influential Points and Variables in Scatterplots

The video tutorial explains how to read and set up a scatterplot, focusing on the roles of explanatory and response variables. It discusses influential points and outliers, and provides guidance on setting up a graph with examples, such as beach attendance and temperature. The tutorial emphasizes the importance of correctly identifying variables and plotting data points.

What is the primary purpose of understanding scatterplot vocabulary?

• To accurately interpret data relationships

• To create colorful graphs

• To memorize statistical terms

• To confuse the audience

Where is the explanatory variable typically placed on a scatterplot?

• On the y-axis

• On the x-axis

• In the title

• In the legend

Which variable is considered the dependent variable in a scatterplot?

• The one that is independent

• The one that responds to changes

• The one that is always constant

• The one on the x-axis

What is the role of the response variable in a scatterplot?

• It is unaffected by the explanatory variable

• It causes changes in the explanatory variable

• It is always plotted on the x-axis

• It responds to changes in the explanatory variable

What assumption is made about the explanatory variable?

• It is always constant

• It is assumed to explain changes in the response variable

• It is always plotted on the y-axis

• It is always the cause of the response variable

Which variable is plotted on the y-axis in a scatterplot?

• Independent variable

• Control variable

• Explanatory variable

• Response variable

In the context of scatterplots, what does the term 'explanatory variable' imply?

• It is the variable that remains constant

• It is always plotted on the y-axis

• It is the variable that explains changes in the response variable

• It is the variable that is explained by the response variable

What is the role of the x-axis in a scatterplot?

• To display the control variable

• To display the dependent variable

• To display the response variable

• To display the explanatory variable

What is an influential point in a scatterplot?

• A point that is always on the trendline

• A point that significantly affects the trendline

• A point that is always an outlier

• A point that is far from the axes

Which of the following is NOT a characteristic of an influential point?

• It is far from the main data cluster

• It significantly affects the trendline

• It is always an outlier

• It can be on the trendline