Scatterplots Review Flashcard

Front

What is a scatterplot?

Back

A scatterplot is a graphical representation of two variables, showing the relationship between them using points on a Cartesian plane.

Front

What does a negative correlation in a scatterplot indicate?

Back

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

Front

What is a positive correlation in a scatterplot?

Back

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

Front

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

Back

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

Front

What is the purpose of a 'Line of Best Fit' in a scatterplot?

Back

The 'Line of Best Fit' is used to summarize the relationship between the variables and to make predictions based on the data.

Front

How can you determine if a scatterplot shows a linear or non-linear relationship?

Back

A linear relationship can be identified if the points roughly form a straight line, while a non-linear relationship shows a curved pattern.

Front

What factors can affect the accuracy of a 'Line of Best Fit'?

Back

Outliers, the distribution of data points, and the choice of the fitting method can all affect the accuracy of a 'Line of Best Fit'.

Front

What is the significance of outliers in a scatterplot?

Back

Outliers are data points that differ significantly from other observations and can skew the results and interpretation of the scatterplot.

Front

How do you interpret the slope of a 'Line of Best Fit'?

Back

The slope indicates the direction and strength of the relationship between the two variables; a positive slope indicates a positive correlation, while a negative slope indicates a negative correlation.

Front

What is the difference between correlation and causation?

Back

Correlation indicates a relationship between two variables, while causation implies that one variable directly affects the other.