miceadds: micombine.F – R documentation

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micombine.F

Combination of F Statistics for Multiply Imputed Datasets Using a Chi Square Approximation

Description

Several F statistics from multiply imputed datasets are combined using an approximation based on χ^2 statistics (see micombine.chisquare).

Usage

micombine.F(Fvalues, df1, display=TRUE, version=1)

Arguments

`Fvalues`	Vector containing F values.
`df1`	Degrees of freedom of the numerator. Degrees of freedom of the numerator are approximated by ∞ (large number of degrees of freedom).
`display`	A logical indicating whether results should be displayed at the console
`version`	Integer indicating which calculation formula should be used. The default `version=1` refers to the correct formula as in Enders (2010), while `version=0` uses an incorrect formula as printed in Allison (2001). The incorrect calculation `version=0` was included in miceadds versions smaller than version 2.0. See also http://statisticalhorizons.com/wp-content/uploads/2012/01/combchi.sas.

Value

The same output as in micombine.chisquare

References

Allison, P. D. (2002). Missing data. Newbury Park, CA: Sage.

Enders, C. K. (2010). Applied missing data analysis. Guilford Press.

Grund, S., Luedtke, O., & Robitzsch, A. (2016). Pooling ANOVA results from multiply imputed datasets: A simulation study. Methodology, 12(3), 75-88. doi: 10.1027/1614-2241/a000111

Examples

#############################################################################
# EXAMPLE 1: F statistics for 5 imputed datasets
#############################################################################

Fvalues <- c( 6.76, 4.54, 4.23, 5.45, 4.78 )
micombine.F(Fvalues, df1=4 )
  ##  Combination of Chi Square Statistics for Multiply Imputed Data
  ##  Using 5 Imputed Data Sets
  ##  F(4, 52.94)=3.946     p=0.00709

miceadds

Some Additional Multiple Imputation Functions, Especially for 'mice'

v3.11-6

GPL (>= 2)

Authors

Alexander Robitzsch [aut,cre] (<https://orcid.org/0000-0002-8226-3132>), Simon Grund [aut] (<https://orcid.org/0000-0002-1290-8986>), Thorsten Henke [ctb]

Initial release

2021-01-21 11:48:47