Scatterplots and Trend Lines Review

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 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 general direction of the data points.

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

How can you determine the type of relationship shown in a scatterplot?

Back

You can determine the type of relationship by observing the direction and pattern of the data points.

Front

What is the purpose of using scatterplots in data analysis?

Back

Scatterplots are used to visually assess the relationship between two quantitative variables.

Front

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

Back

A nonlinear association means that the relationship between the variables cannot be accurately represented by a straight line.

Front

What is the significance of the slope of the line of best fit?

Back

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

Front

What can be inferred if a scatterplot shows a downward trend?

Back

A downward trend suggests a negative association between the two variables.