Scatterplots

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 the line of best fit represent in a scatterplot?

Back

The line of best fit represents the trend in the data, indicating the general direction of the relationship between the two variables.

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 another variable, resulting in an upward slope.

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 another variable, resulting in a downward slope.

Front

What does no correlation mean in a scatterplot?

Back

No correlation means there is no discernible relationship between the two variables, and the points do not show any clear pattern.

Front

How can you identify a positive correlation in a scatterplot?

Back

You can identify a positive correlation if the points tend to rise from left to right.

Front

How can you identify a negative correlation in a scatterplot?

Back

You can identify a negative correlation if the points tend to fall from left to right.

Front

What is the purpose of the correlation coefficient?

Back

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

Front

What does a correlation coefficient of 0 indicate?

Back

A correlation coefficient of 0 indicates no correlation between the two variables.

Front

What is the significance of outliers in a scatterplot?

Back

Outliers are data points that differ significantly from other observations and can affect the line of best fit and the correlation.