Scatterplots Correlation

Front

What is a scatterplot?

Back

A scatterplot is a graphical representation of two variables, where each point represents an observation in the dataset, allowing for the visualization of relationships between the variables.

Front

What does correlation refer to in statistics?

Back

Correlation refers to the statistical measure that describes the extent to which two variables change together. It can be positive, negative, or zero.

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 does no correlation mean?

Back

No correlation means that there is no discernible relationship between the changes in two variables.

Front

How can you identify a positive correlation in a scatterplot?

Back

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

Front

How can you identify a negative correlation in a scatterplot?

Back

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

Front

What is the range of correlation coefficients?

Back

The range of correlation coefficients is from -1 to +1, where -1 indicates a perfect negative correlation, +1 indicates a perfect positive correlation, and 0 indicates no correlation.

Front

What is the significance of a correlation coefficient of 0.8?

Back

A correlation coefficient of 0.8 indicates a strong positive correlation between the two variables.

Front

What is the significance of a correlation coefficient of -0.5?

Back

A correlation coefficient of -0.5 indicates a moderate negative correlation between the two variables.