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Population statistics is the use of statistics to analyze characteristics or changes to a population. It is related to social demography and demography.

Population statistics can analyze anything from global demographic changes to local small scale changes. For example, an analysis of global change shows that population growth has slowed, infant mortality rates have declined and there have been small increases in the aged.

## Collection

National population statistics are usually collected by conducting a census. However, because these are usually huge logistical exercises, countries normally conduct censuses only once every five to 10 years. Even when a census is conducted it may miss counting everyone (known as undercount). Also, some people counted in the census may be recorded in a different place than where they usually live, because they are travelling, for example (this may result in overcounting). Consequently, raw census numbers are often adjusted to produce census estimates that identify such statistics as resident population, residents, tourists and other visitors, nationals and aliens(non-nationals). For privacy reasons, particularly when there are small counts, some census results may be rounded, often to the nearest ten, hundred, thousand and sometimes randomly up, down or to another small number such as within 3 of the actual count.

Between censuses, administrative data collected by various agencies about population events such as births, deaths, and cross-border migration may be used to produce intercensal estimates.

## Population estimates and projections

Population estimates are usually derived from census and other administrative data. Population estimates are normally produced after the date the estimate is for.

Some estimates, such as the Usually resident population estimate who usually lives in a locality as at the census date, even though the census did not count them within that locality. Census questions usually include a questions about where a person usually lives, whether they are a resident or visitor, or also live somewhere else, to allow these estimates to be made.

Other estimates are concerned with estimating population on a particular date that is different from the census date, for example the middle or end of a calendar or financial year. These estimates often use birth and death records and migration data to adjust census counts for the changes that have happened since the census.

Population projections are produced in advance of the date they are for. They use time series analysis of existing census data and other sources of population information to forecast the size of future populations. Because there are unknown factors that may affect future population changes, population projections often incorporate high and low as well as expected values for future populations. Population projections are often recomputed after a census has been conducted. It depends on how conjusted the area is in the particular demarcation.

## History

While many censuses were conducted in antiquity, there are few population statistics that survive. One example though can be found in the Bible, in chapter 1 of the Book of Numbers. Not only are the statistics given, but the method used to compile those statistics is also described. In modern day terms, this metadata about the census is probably of as much value as the statistics themselves as it allows researchers to determine not only what was being counted but how and why it was done.

Modern population statistics are normally accompanied by metadata that explains how the statistics have been compiled and adjusted to compensate for any collection issues.

## Statistical sources

Most countries have a census bureau or government agency responsible for conducting censuses. Many of these agencies publish their country's census results and other population statistics on their agency's website.

## References

 941109 videos foundNext >
 Statistics - 1 - Terms - 2 - Population and SampleThis video develops the concept of a population and a sample. Statistics: Variance of a PopulationVariance of a population. More free lessons at: http://www.khanacademy.org/video?v=6JFzI1DDyyk. Hans Rosling's 200 Countries, 200 Years, 4 Minutes - The Joy of Stats - BBC FourMore about this programme: http://www.bbc.co.uk/programmes/b00wgq0l Hans Rosling's famous lectures combine enormous quantities of public data with a sport's ... Hans Rosling: Stats that reshape your world-viewhttp://www.ted.com With the drama and urgency of a sportscaster, statistics guru Hans Rosling uses an amazing new presentation tool, Gapminder, to present da... Statistics 101: Population vs Sample DataStatistics 101: Population vs Sample Data. In this video we discuss the basic differences between population data and sample data. What is a population? What... Statistics: Sample vs. Population MeanThe difference between the mean of a sample and the mean of a population. Stunning American Prison Population Statistics"If Americans under correctional supervision counted as a city of their own, they would form the largest city in the United States after New York. The number... Confidence Interval for Population Means in StatisticsIn this lesson, we'll discuss the concept of the confidence interval in statistics. We'll solve a few problems where we must calculate the confidence interva... Population pyramids: Powerful predictors of the future - Kim PreshoffView full lesson: http://ed.ted.com/lessons/population-pyramids-powerful-predictors-of-the-future-kim-preshoff Population statistics are like crystal balls -... Statistics 101: Confidence Intervals, Population Deviation KnownStatistics 101: Confidence Intervals, Population Deviation Known. In this video we introduce the concept of a confidence interval for the population mean. A ...
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 Stuff.co.nz NZ population growth speeds up New Zealand Herald Thu, 14 Aug 2014 00:40:38 -0700 The estimates were the best available indication of how many people live in New Zealand, because they included people missed by the census, including those who were temporarily overseas on census night, population statistics manager Vina Cullum said. Room rates up as foreign tourists return Stuff.co.nz Tue, 02 Sep 2014 09:52:30 -0700 Statistics NZ population statistics manager Susan Hollows said more visitors from Indonesia, Australia and China had boosted numbers for the July record. But hotels and motels had a quiet June, statistics showed, with guest nights down 4.4 per cent in ... Arizona Republic 5 measures of Arizona's economy as fall season arrives Arizona Republic Sun, 31 Aug 2014 23:11:15 -0700 ... spot: Much of the expected growth in jobs over the next two years will be in health-care services, retail positions and in the hospitality industry, said Aruna Murthy, director of economic analysis for the Arizona Office of Employment and ... The Wellingtonista Where the Voters Aren't The Wellingtonista Tue, 02 Sep 2014 21:18:45 -0700 You could be forgiven for thinking that all Wellingtonians are obsessed with politics. Advance voting started today, and already some voters are proudly sporting their “YES I have voted” stickers. Yet thousands of Wellingtonians have still not enrolled ... The New Republic Remember me on this computer The New Republic Wed, 13 Aug 2014 17:11:15 -0700 Michael Brown's Death Was Shocking. So Are the Racial Profiling Stats We've Been Ignoring. 93% of drivers arrested in Ferguson are black, but blacks make up 67% of the population. By Jason Zengerle @zengerle Photo: Scott Olson/Getty Images. For the ... Irish Examiner HORIZON 2020: Working together for the benefit of all Irish Examiner Mon, 01 Sep 2014 19:26:15 -0700 Finally, consider for a moment the following startling population statistics: iIn 1950, 3bn people lived on this planet. Currently, there is a population of approximately 7bn people. In just 30 years from now, this figure is projected to increase to ... 1 million ... 1 million and 1 ... 1 million and 2 -- Wake's population just ... The State Fri, 22 Aug 2014 19:52:40 -0700 The county contracted with the Carolina Population Center at UNC to work up some population statistics this summer, and the million-mark estimation was part of the package. To estimate the date, demographer Becky Tippett compared the 2010 census ... Congressional Black Caucus: Too Many Black Judges? National Review Online Wed, 27 Aug 2014 14:00:00 -0700 According to 2010 population statistics, blacks make up 12.6% of the U.S. population. The Congressional Black Caucus's numbers show that blacks hold 12.1% of federal judgeships. That would suggest a trivial disparity (again, even using a very favorable ...
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