Scatterplots

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 a positive correlation indicate in a scatterplot?

Back

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

Front

What does a negative correlation indicate in a scatterplot?

Back

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

Front

What is the correlation coefficient (r)?

Back

The correlation coefficient (r) is a statistical measure that describes the strength and direction of a relationship between two variables, ranging 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, meaning changes in one variable do not predict changes in the other.

Front

What is a strong positive correlation?

Back

A strong positive correlation is indicated by an r value close to 1, suggesting a strong relationship where both variables increase together.

Front

What is a strong negative correlation?

Back

A strong negative correlation is indicated by an r value close to -1, suggesting a strong relationship where one variable increases while the other decreases.

Front

How can you visually identify correlation in a scatterplot?

Back

Correlation can be visually identified in a scatterplot by observing the direction and pattern of the points; a linear pattern indicates 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.

Front

What factors can affect the correlation observed in a scatterplot?

Back

Factors such as outliers, sample size, and the range of data can affect the correlation observed in a scatterplot.