Scatterplots

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 an outlier represent in a scatterplot?

Back

An outlier is a data point that differs significantly from other observations. It may indicate variability in the measurement or a possible experimental error.

Front

How do you identify an outlier in a scatterplot?

Back

An outlier can be identified as a point that lies far away from the cluster of other points in the scatterplot.

Front

What is correlation in the context of scatterplots?

Back

Correlation refers to the relationship between two variables. It can be positive, negative, or no correlation.

Front

What does a positive correlation indicate?

Back

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

Front

What does a negative correlation indicate?

Back

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

Front

What does no correlation mean?

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 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

How can 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 no slope indicates no correlation.

Front

What are the coordinates of an outlier?

Back

The coordinates of an outlier are the specific x and y values that represent the outlier point in the scatterplot.