Statisticians use statistical methods to collect and analyze data and to help solve real-world problems in business, engineering, healthcare, or other fields.
Statisticians typically do the following:
Decide what data are needed to answer specific questions or problems
Determine methods for finding or collecting data
Design surveys, experiments, or opinion polls to collect data
Collect data or train others to do so
Analyze and interpret data
Report conclusions from their analyses
Statisticians design surveys, questionnaires, experiments, and opinion polls to collect the data they need. Surveys may be mailed, conducted over the phone, collected online, or gathered through some other means.
Some surveys, such as the U.S. census, include data from nearly everyone. For most surveys and opinion polls, however, statisticians use sampling to collect data from some people in a particular group. Statisticians determine the type and size of the sample to be surveyed or polled.
Statisticians use specialized statistical software to analyze data. In their analyses, statisticians identify trends and relationships within the data. They also conduct tests to find out the data's validity and to account for high survey nonresponse rates or sampling error. Some statisticians may help create new software to analyze data more accurately and efficiently.
Statisticians present the findings from their analyses and discuss the data's limitations to prevent inaccurate conclusions from being drawn. They may present written reports, tables, charts, and graphs to other team members and to clients. Statisticians also recommend how to improve the design of future surveys or experiments.
Statisticians work in many fields, such as education, marketing, psychology, sports, or any other field that requires the collection and analysis of data. In particular, government, healthcare, and research and development companies employ many statisticians.
Government. Statisticians working in government develop and analyze surveys that collect a variety of data, including unemployment rates, wages, and other estimates pertaining to jobs and workers. Other statisticians help to figure out the average level of pesticides in drinking water, the number of endangered species living in a particular area, or the number of people who have a certain disease.
Some statisticians employed by the federal government are known as mathematical statisticians.
Healthcare. Statisticians known as biostatisticians or biometricians work in pharmaceutical companies, public health agencies, or hospitals. They may design studies to test whether drugs successfully treat diseases or medical conditions. They may also help identify the sources of outbreaks of illnesses in humans and animals.
Research and development. Statisticians design experiments for product testing and development. For instance, they may help design experiments to see how car engines perform when exposed to extreme weather conditions. Statisticians may also help develop marketing strategies and prices for consumer goods.
Statisticians often collaborate with other occupations in the design and conduct of the research.
Some people with a degree in statistics or who collect and analyze statistical data may not be formally known as statisticians. Instead, they may work in related fields and professions. In some industries, for example, they may be known as quantitative analysts, market research analysts, data analysts, or data scientists.