Scatterplots and outliers

Front

What is a scatterplot?

Back

A scatterplot is a graphical representation of two variables, showing the relationship between them using points on a Cartesian plane.

Front

What does an outlier represent in a scatterplot?

Back

An outlier is a data point that differs significantly from other observations in a dataset, indicating a potential anomaly or variation.

Front

How can you identify an outlier in a scatterplot?

Back

Outliers can be identified visually as points that are far removed from the overall pattern of the data.

Front

What is the purpose of using scatterplots?

Back

Scatterplots are used to visualize the relationship between two quantitative variables and to identify trends, correlations, or outliers.

Front

What does a positive correlation in a scatterplot indicate?

Back

A positive correlation indicates that as one variable increases, the other variable also tends to increase.

Front

What does a negative correlation in a scatterplot indicate?

Back

A negative correlation indicates that as one variable increases, the other variable tends to decrease.

Front

What is the significance of the axes in a scatterplot?

Back

The x-axis typically represents the independent variable, while the y-axis represents the dependent variable.

Front

How can you determine the year a specific donation amount was received from a scatterplot?

Back

By locating the point that corresponds to the donation amount on the y-axis and reading the associated year on the x-axis.

Front

What is the importance of scale in a scatterplot?

Back

The scale affects how data is visualized; inappropriate scaling can misrepresent the relationship between variables.

Front

What does it mean if a scatterplot shows no correlation?

Back

No correlation means there is no discernible relationship between the two variables, and the points are scattered randomly.