Scatter plots and Correlation

Front

What is a scatter plot?

Back

A scatter plot is a type of graph that shows the relationship between two numerical variables by displaying data points on a two-dimensional grid.

Front

What does a positive correlation indicate?

Back

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

Front

What does a negative correlation indicate?

Back

A negative correlation indicates that as one variable increases, the other variable decreases.

Front

What is no correlation?

Back

No correlation means there is no predictable relationship between the two variables; changes in one do not affect the other.

Front

How can you identify a positive correlation in a scatter plot?

Back

In a scatter plot, a positive correlation is identified when the data points trend upwards from left to right.

Front

How can you identify a negative correlation in a scatter plot?

Back

In a scatter plot, a negative correlation is identified when the data points trend downwards from left to right.

Front

What is the correlation coefficient?

Back

The correlation coefficient is a numerical value between -1 and 1 that measures the strength and direction of a linear relationship between two variables.

Front

What does a correlation coefficient of 1 mean?

Back

A correlation coefficient of 1 means there is a perfect positive correlation between the two variables.

Front

What does a correlation coefficient of -1 mean?

Back

A correlation coefficient of -1 means there is a perfect negative correlation between the two variables.

Front

What does a correlation coefficient of 0 mean?

Back

A correlation coefficient of 0 means there is no correlation between the two variables.