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Prospective study: The studies in which individuals are followed-up over the period of time. A general example of this type of investigation is where the samples of individuals are exposed and not exposed to the possible risk factor for a specific disease, are followed forward in time to determine what effects occur to them with respect to the illness under the investigation. At the end of the appropriate time period a comparison of the incidence of the disease between the exposed and non-exposed is made. A classic instance of such a study is that undertaken among the British doctors in the 1950s, to examine the relationship between smoking and death from the lung cancer. All the clinical trials are prospective.
Opreation research phase
Half-normal plot is a plot for diagnosing the model inadequacy or revealing the presence of outliers, in which the absolute values of, for instance, the residuals from the multipl
A term which covers the large number of techniques for the analysis of the multivariate data which have in common the aim to assess whether or not the set of variables distinguish
Generalized method of moments (gmm) is the estimation method popular in econometrics which generalizes the method of the moments estimator. Essentially same as what is known as the
The transformation of the Pearson's product moment correlation coefficient, r, can be given by The statistic z has the normal distribution with mean here ρ is the pop
re-reference all these indexes
can you help specify the model for an event study and to interpret the results/
The process of providing the numerical value for the population parameter on the basis of information gathered from a sample. If a single ?gure is computed for the unknown paramete
Institutional surveys are the surveys in which the primary sampling units are the institutions, for instance, hospitals. Within each of the sampled institution, a sample of the pa
A subject who withdraws from the study for whatever reason, adverse side effects, noncompliance, moving away from the district, etc. In number of cases the reason may not be known.
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