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 trendline represent in a scatterplot?

Back

A trendline is a line that best represents the data points in a scatterplot, showing the general direction of the data.

Front

What is a positive correlation?

Back

A positive correlation occurs when an increase in one variable leads to an increase in another variable.

Front

What is a negative correlation?

Back

A negative correlation occurs when an increase in one variable leads to a decrease in another variable.

Front

What is an outlier in a scatterplot?

Back

An outlier is a point that is far outside the main cluster of points in a scatterplot, which may indicate an unusual observation.

Front

How do you identify a positive association in a scatterplot?

Back

A positive association is identified when the points in the scatterplot tend to rise from left to right.

Front

How do you identify a negative association in a scatterplot?

Back

A negative association is identified when the points in the scatterplot tend to fall from left to right.

Front

What is the correlation coefficient?

Back

The correlation coefficient is a numerical measure of the strength and direction of a relationship between two variables, ranging from -1 to 1.

Front

What does it mean if the correlation coefficient is close to 1?

Back

If the correlation coefficient is close to 1, it indicates a strong positive correlation between the two variables.

Front

What does it mean if the correlation coefficient is close to -1?

Back

If the correlation coefficient is close to -1, it indicates a strong negative correlation between the two variables.