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The repercussions of inaccurate or improperly interpreted data are wide-ranging.
For example, a telephone survey of one thousand car owners in the United States might be conducted to predict the popularity of various cars among all U. First and perhaps foremost, an unbiased sample must be used.
In other words, every person (or item) in the population should have an equal chance of being in the sample.
Please "contact us" to request a format other than those available. Practical Methods for Design and Analysis of Complex Surveys.
Scope and purpose Principles Guidelines Quality indicators References Data analysis is the process of developing answers to questions through the examination and interpretation of data.
"Policy on the Review of Information Products." Statistics Canada Policy Manual.
Data interpretation is part of daily life for most people.Information identified as archived is provided for reference, research or recordkeeping purposes. It is not subject to the Government of Canada Web Standards and has not been altered or updated since it was archived. This is just one of many possible examples that reveal how data gathering and interpretation related to population can have a marked affect on the whole country.The process of data interpretation begins by gathering data. car owners who are surveyed are the sample and all car owners in the United States are the population.Some Statistics Canada programs depend on analytical output as a major data product because, for confidentiality reasons, it is not possible to release the microdata to the public. Data analysis also plays a key role in data quality assessment by pointing to data quality problems in a given survey. The results are used to help determine the number of congressional seats that are assigned to each district; where new roads will be built; where new schools and libraries are needed; where new nursing homes, hospitals, and day care centers will be located; where new parks and recreational centers will be built; and the sizes of police and fire departments. People have migrated from the northern states toward the southern states, and the result has been a major shift in congressional representation.In the past 30 years there has been a major shift in the U. With a net change of nearly 30 percent (a 17 percent drop in the Northeast and Midwest coupled with a 12 percent gain in the South), the South has gone from a position of less influence to one of greater influence in Congress as a result of population-based reapportionment .Interpretation is the process of making sense of numerical data that has been collected, analyzed, and presented.People interpret data when they turn on the television and hear the news anchor reporting on a poll, when they read advertisements claiming that one product is better than another, or when they choose grocery store items that claim they are more effective than other leading brands.