A sample is a portion and a census measures absolutely everyone in the whole country. A representative sample measures a small number of people who fit a particular category of people: surveying 200 white male smokers between 20 and 40 who have had surgery for throat cancer (out of a total number of say 35,000 men who fit that profile).
Researchers define a "population" which consists of elements with defined characteristics. Example: All the matriculating students at Providence College. If the researcher studies the entire population as defined above, it is called a "census". If, on the other hand, the researcher takes a subset of the population, a sample, and studies it it will be a sample survey (or study in more general terms.)
A census is a statistical enumeration and analysis of a certain population, be it humans, animals or plants - groups that grow and change over time. A survey can be a tally of opinions or answers. See "Family Feud" when Richard Dawson says, "Survey says...!!!!"
Both census and sample survey are methods used to collect data from a population. However, while a census attempts to gather information from every individual in the population, a sample survey collects data from a subset of the population. Both methods aim to provide insights and statistics about the population under study.
The census surveys all members of the population. If the objective of the survey is to find representative values of certain attributes, say how much does the average fisherman make in Alaska, then certainly a survey that includes all fisherman should be more accurate. If all members of the population are surveyed, then the resultant summary values would be considered parameters rather than statistics. For example:no statistical inference is made if I state there are 1,000 fisherman in Alaska, and a tally of all of them, shows their average income is $20,000. I can say that a census should be more accurate than a sample survey, provided all other factors are the same and precautions are taken to obtain reliable data. A census conducted in a biased manner will not provide accurate parameters.
Only in terms of cost, time to complete, resources-those kinds of measures. A census provides complete information if done properly which is not possible with just a sample. A sample is always subject to sampling error.
A sample survey is asked of a limited group of people, while a census is conducted in an attempted to get an answer from all people in a geographical area.
A Census is the type of survey for a complete population. A Sample Survey is only a portion of the population which is used to make predictions on the representation of the actual population.
Statistics: Survey of an entire population, as opposed to a sample survey.
Researchers define a "population" which consists of elements with defined characteristics. Example: All the matriculating students at Providence College. If the researcher studies the entire population as defined above, it is called a "census". If, on the other hand, the researcher takes a subset of the population, a sample, and studies it it will be a sample survey (or study in more general terms.)
becuase it is more accurate.
A sample survey may be preferable than a census because it can be more comprehensive. While its research only involves a subset, it is typically more accurate.
A population survey, better known as a census, entails the collection of each unit in the population. In sample survey information is collected from a subset of the population. The subset, or sample, needs to be selected carefully so that it is representative of the whole population and, if that requirement is met, statistics based on the sample are good estimators for the corresponding population parameters.
A census is a statistical enumeration and analysis of a certain population, be it humans, animals or plants - groups that grow and change over time. A survey can be a tally of opinions or answers. See "Family Feud" when Richard Dawson says, "Survey says...!!!!"
A sample survey is quicker and cheaper. If the survey is well designed then the results are likely to be close to their true values.
Both census and sample survey are methods used to collect data from a population. However, while a census attempts to gather information from every individual in the population, a sample survey collects data from a subset of the population. Both methods aim to provide insights and statistics about the population under study.
Hospital censes,vital statistics, medical records, registers
The census surveys all members of the population. If the objective of the survey is to find representative values of certain attributes, say how much does the average fisherman make in Alaska, then certainly a survey that includes all fisherman should be more accurate. If all members of the population are surveyed, then the resultant summary values would be considered parameters rather than statistics. For example:no statistical inference is made if I state there are 1,000 fisherman in Alaska, and a tally of all of them, shows their average income is $20,000. I can say that a census should be more accurate than a sample survey, provided all other factors are the same and precautions are taken to obtain reliable data. A census conducted in a biased manner will not provide accurate parameters.