Unit 8: Scatterplots and Associations

Front

What is a scatterplot?

Back

A scatterplot is a graph that displays values for typically two variables for a set of data. Each point represents an observation in the dataset.

Front

What does it mean if a scatterplot shows no relationship?

Back

It means that there is no discernible pattern or correlation between the two variables being plotted.

Front

What is a positive linear association in a scatterplot?

Back

A positive linear association occurs when, as one variable increases, the other variable also increases, resulting in a rising line on the graph.

Front

What is a negative linear association in a scatterplot?

Back

A negative linear association occurs when, as one variable increases, the other variable decreases, resulting in a falling line on the graph.

Front

What does a non-linear association in a scatterplot indicate?

Back

A non-linear association indicates that the relationship between the two variables does not follow a straight line, meaning the rate of change varies.

Front

How can you identify a scatterplot with no association?

Back

A scatterplot with no association will show points that are randomly scattered without any clear pattern or trend.

Front

What is the purpose of using scatterplots in data analysis?

Back

Scatterplots are used to visually assess the relationship between two quantitative variables, helping to identify trends, correlations, or patterns.

Front

What does it mean if a scatterplot shows a strong association?

Back

A strong association in a scatterplot means that the points are closely clustered around a line, indicating a clear relationship between the variables.

Front

What is the significance of outliers in a scatterplot?

Back

Outliers are data points that fall far from the other points in the scatterplot, which can indicate anomalies or errors in data collection.

Front

How do you interpret the slope of a line in a scatterplot?

Back

The slope indicates the direction and steepness of the relationship between the two variables; a positive slope means a positive association, while a negative slope indicates a negative association.