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Go behind the scenes with our team as we find and make sense of the numbers.

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To help put that data in context, we’ve identified five foundational concepts that can shape how data is collected, reported, and interpreted. Understanding them can help you get more out of the charts and datasets you see here, and elsewhere.

A visualization showing an example of statistical data.
A visualization of CDC versus FBI murder rates

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The two sources we most commonly used for murder data are the Centers for Disease Control and Prevention’s (CDC) National Vital Statistics System and the FBI’s Uniform Crime Reporting Program. But what gives? Which one is right?

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