In an increasingly data-driven world, it is more important than ever for students as well as professionals to better understand basic statistical concepts. 100 Questions (and Answers) About Statistics addresses the essential questions that students ask about statistics in a concise and accessible way. It is perfect for instructors, students, and practitioners as a supplement to more comprehensive materials, or as a desk reference with quick answers to the most frequently asked questions.

# What Are Some Important Things to Remember About Understanding and Using Correlation Coefficients?

### What Are Some Important Things to Remember About Understanding and Using Correlation Coefficients?

Several important points are key to understanding and using correlation coefficients in the study of statistics.

• Correlation coefficients reflect the amount of variability or dispersion that is shared between two variables. The more that is shared, the stronger the relationship. If one variable has no variability and does not differ among the individuals being assessed, then the correlation is zero (the two variables being compared share nothing).
• The Pearson product-moment correlation coefficient is represented by the small letter r, with a subscript representing the variables that are being correlated. For example,
• rxy is the correlation between variable X and variable Y.
• rstrength . speed is the correlation between strength and speed.
• rattitude . outcomes is ...