Correlation Coefficient

Front

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

Back

-1 ≤ r ≤ 1

Front

What does a correlation coefficient close to -1 indicate?

Back

A strong negative correlation between two variables.

Front

What type of association does a positive correlation indicate?

Back

As one variable increases, the other variable also increases.

Front

What type of association does a negative correlation indicate?

Back

As one variable increases, the other variable decreases.

Front

What is the correlation coefficient for no correlation?

Back

r = 0

Front

What type of functions is the correlation coefficient r useful for?

Back

Linear functions.

Front

What does a correlation coefficient of 0.8 indicate?

Back

A strong positive correlation.

Front

What does a correlation coefficient of -0.5 indicate?

Back

A moderate negative correlation.

Front

What is the purpose of a regression line in a scatter plot?

Back

To show the trend of the data and make predictions.

Front

What is the difference between correlation and causation?

Back

Correlation indicates a relationship between two variables, while causation indicates that one variable directly affects the other.