Scatterplots and Trend Lines

Front

What is a scatterplot?

Back

A scatterplot is a graph that shows the relationship between two quantitative variables by displaying data points on a two-dimensional axis.

Front

What does a positive association in a scatterplot indicate?

Back

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

Front

What does a negative association in a scatterplot indicate?

Back

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

Front

What is a line of best fit?

Back

A line of best fit is a straight line that best represents the data on a scatterplot, showing the overall trend of the data.

Front

What does it mean if there is no association in a scatterplot?

Back

No association means that there is no discernible relationship between the two variables being plotted.

Front

What is a nonlinear relationship?

Back

A nonlinear relationship is when the data points do not form a straight line, indicating that the relationship between the variables is more complex.

Front

How can you determine the strength of an association in a scatterplot?

Back

The strength of an association can be determined by how closely the data points cluster around the line of best fit; tighter clusters indicate a stronger association.

Front

What is the purpose of using scatterplots in data analysis?

Back

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

Front

What does the slope of the line of best fit represent?

Back

The slope of the line of best fit represents the rate of change between the two variables; a steeper slope indicates a stronger relationship.

Front

What is an outlier in a scatterplot?

Back

An outlier is a data point that significantly differs from the other points in the scatterplot, which can affect the overall trend.