What type of report was implemented by the FBI to compile crime data in the 1930s?

The FBI implemented the Uniform Crime Report (UCR) in the 1930s to compile crime data across the United States. This system was established to create a consistent way of reporting and analyzing crimes, allowing for comprehensive national statistics. The UCR collects data on various types of crime, including violent crimes and property crimes, from law enforcement agencies across the country.

This data collection not only aids in understanding crime trends but also assists in resource allocation and policy-making within law enforcement. By providing a systematic approach to crime reporting, the UCR has been instrumental in tracking crime rates and developing strategies for crime prevention and intervention.

In contrast, the other options represent different types of reports or surveys that either do not align with the specifics of the 1930s initiative by the FBI or were not designed for the same purpose as the UCR. For example, the National Crime Survey is a victimization survey that began in the 1970s and focuses on personal and household crime experiences rather than police-reported crime statistics.