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 Other Measures of Correlation, and How Are They Used?

What Are Some Other Measures of Correlation, and How Are They Used?

The Pearson product-moment correlation is only one way to compute a correlation, and it is most useful when looking at the relationship between two variables that are continuous in nature, that is, variables that can take on any value along a continuum. One example is the number of words spelled correctly on a spelling test.

What about all those other situations in which variables are not continuous and can only have values at specific points on some scale? These include such categorical variables as gender (male or female or yes or no or 1 or 2) or party affiliation (Republican, Democrat, or other).

The following chart shows what type of correlation to use when ...

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