What are some examples of correlation coefficients?

What are some examples of correlation coefficients?

Correlation coefficients measure the strength and direction of a relationship between two variables. For example, a correlation coefficient of +1 indicates a perfect positive correlation, while -1 indicates a perfect negative correlation.

Can you give me a real-world example?

Sure! A real-world example is the correlation between study time and exam scores. Generally, as study time increases, exam scores tend to increase, resulting in a positive correlation.

What about a negative correlation?

An example of a negative correlation is the relationship between the amount of exercise and body weight. As exercise increases, body weight tends to decrease, indicating a negative correlation.

How do I calculate the correlation coefficient?

You can calculate the correlation coefficient using Pearson's formula, which involves the covariance of the variables divided by the product of their standard deviations.