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Meta- analysis: Is the application of statistical procedures to examine tests of a common hypothesis from more than one study.ĭata collected needs to be transformed into ′ information′, by reducing them, summarizing them and adjusting them for variations, such as age and sex composition of the population, so that comparisons over time and place are possible.
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Secondary analysis: Is the re-analysis of data from a single study to test new hypotheses or to apply more appropriate statistical procedures to test the original hypotheses.Primary analysis: Is the analysis of data from a single study to test the hypotheses originally formulated.Analysis of data is a key component of any research it can be of following types: ′ Data′ consist of discrete observations of attributes or events that carry little meaning when considered alone.