Scatterplots

Front

What is a scatterplot?

Back

A scatterplot is a type of graph that displays values for typically two variables for a set of data. Each point on the graph represents an observation.

Front

What do the points on a scatterplot represent?

Back

The points on a scatterplot represent individual data points, showing the relationship between the two variables being analyzed.

Front

How do you determine the relationship between two variables in a scatterplot?

Back

You can determine the relationship by observing the pattern of the points. If the points trend upwards, there is a positive correlation; if they trend downwards, there is a negative correlation.

Front

What is a positive correlation in a scatterplot?

Back

A positive correlation occurs when an increase in one variable corresponds to an increase in the other variable, resulting in a pattern that slopes upwards.

Front

What is a negative correlation in a scatterplot?

Back

A negative correlation occurs when an increase in one variable corresponds to a decrease in the other variable, resulting in a pattern that slopes downwards.

Front

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

Back

No correlation means that there is no discernible pattern between the two variables; the points are scattered randomly.

Front

What is the purpose of a trend line in a scatterplot?

Back

A trend line is used to summarize the relationship between the variables, showing the general direction of the data points.

Front

How can outliers affect a scatterplot?

Back

Outliers can skew the interpretation of the data, affecting the correlation and the slope of the trend line.

Front

What is the x-axis in a scatterplot?

Back

The x-axis is the horizontal axis that typically represents the independent variable.

Front

What is the y-axis in a scatterplot?

Back

The y-axis is the vertical axis that typically represents the dependent variable.