Scatter Plot and Linear Regression Review

Front

What is a scatter plot?

Back

A scatter plot is a graph that shows the relationship between two quantitative variables by displaying data points on a two-dimensional axis.

Front

What does a positive correlation indicate?

Back

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

Front

What does a negative correlation indicate?

Back

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

Front

What is the range of the correlation coefficient (r)?

Back

The correlation coefficient (r) ranges from -1 to 1.

Front

What does an r value of 0 indicate?

Back

An r value of 0 indicates no correlation between the two variables.

Front

What is a strong positive correlation?

Back

A strong positive correlation is indicated by an r value close to 1, meaning the variables have a strong tendency to increase together.

Front

What is a strong negative correlation?

Back

A strong negative correlation is indicated by an r value close to -1, meaning as one variable increases, the other decreases significantly.

Front

What is a weak correlation?

Back

A weak correlation is indicated by an r value close to 0, meaning there is little to no relationship between the variables.

Front

How do you interpret an r value of -0.91?

Back

An r value of -0.91 indicates a strong negative correlation.

Front

How do you interpret an r value of 0.19?

Back

An r value of 0.19 indicates a weak positive correlation.