Sentence examples for forms of imputation from inspiring English sources
It also shows how the methods perform under different forms of imputation, although no consistent pattern emerges favoring one form over the others.
As recommended by Hollis and Campbell [ 68], sensitivity analyses will be undertaken across these analyses to examine the potential influence of the missing data using various forms of imputation.
4) Individual Mean Individual mean imputation can also be used as a simple form of imputation in such scenarios.
This approach does not depend on any assumptions about the sources of missing data and we do not regard it as a form of imputation.
The simplest form of imputation is single imputation where a missing observation for a specific variable for each person is replaced by a reasonable value such as, for example, the mean of the observed values for that variable or as "last observation carried forward" (missing values are replaced by the last observed value of that variable) in longitudinal studies.
Application of true ITT analysis requires some assumptions and some form of imputations for the missing data [20],[20].
Notably, SNR rankings derived from the measured data were comparable with the rankings observed following all forms of data imputation and the global imputed dataset exhibited higher overall SNR values.
Statistical techniques to account for missing data, such as full information maximum likelihood and most current forms of multiple imputation, are less efficient when missingness is dependent on variables with missing data than when it is only dependent on variables with information from all participants [ 20].
In this section we concentrate our discussion on a Bayesianly proper form of multiple imputation using the method of chained equationsd.
The first is to ensure we have at hand the correct functional form of the imputation model, and the second is to preserve higher-order dependencies (Collins, Schafer, & Kam, 2001; Rubin, 1996; Schafer, 2001).
