Sampling populations, calculating weighted estimates, and accounting for errors, outliers, and uncertainty are important steps in our work to produce recreational catch statistics. There are two broad ...

Calibration allows estimates from one survey to be expressed in the units, or "currency," of another. It is often a critical part of transitioning to a new survey design. Calibration is a statistical ...

In this short course, learn how to use surveys and statistical analysis to strengthen your research. Surveys are a popular research tool that come with easily-overlooked pitfalls. However, the ...

In this short course, learn how to design a survey to strengthen your research by applying statistical thinking to designing your survey and learning the five steps necessary for collecting data that ...

The environment for obtaining information and providing statistical data for policy makers and the public has changed significantly in the past decade, raising questions about the fundamental survey ...

In this chapter, an overview of the three Bureau of Transportation Statistics (BTS) surveys that the committee reviewed—the National Household Travel Survey (NHTS), the Commodity Flow Survey (CFS), ...

This map shows the base sites that were selected randomly for the National Rivers and Streams Assessment in 2013-14 The National Aquatic Resource Surveys (NARS) use probability-based survey designs in ...

The National Center for Education Statistics (NCES) is the primary federal entity for collecting and analyzing data related to education in the United States and other nations. It fulfills a ...

This fact sheet answers basic questions about how states assess and report on water quality conditions, as summarized in the Assessment and Total Maximum Daily Load Tracking and Implementation System ...

The statistical surveys for the 2027 Best Colleges rankings have officially been distributed. If your institution has not received its survey, please check your spam folders or contact the data ...