Scatterplots and Trendlines

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 correlation indicate in a scatterplot?

Back

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

Front

What does a negative correlation indicate in a scatterplot?

Back

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

Front

What does no correlation mean in a scatterplot?

Back

No correlation means there is no apparent relationship between the two variables; changes in one variable do not predict changes in the other.

Front

What is a trendline?

Back

A trendline is a line that is fitted to the data points in a scatterplot to show the general direction of the data.

Front

How do you determine the type of correlation from a scatterplot?

Back

You can determine the type of correlation by observing the direction of the points: upward slope indicates positive correlation, downward slope indicates negative correlation, and scattered points indicate no correlation.

Front

What is a linear association?

Back

A linear association is when the relationship between two variables can be represented by a straight line.

Front

What is a non-linear association?

Back

A non-linear association is when the relationship between two variables cannot be accurately represented by a straight line.

Front

What is the purpose of using scatterplots in data analysis?

Back

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

Front

What does it mean if a scatterplot shows a cluster of points?

Back

A cluster of points in a scatterplot indicates that there is a concentration of data points in that area, suggesting a potential relationship or trend.