Obtain the default covariance method depending on the degrees of freedom method used.
h_get_cov_default(
method = c("Satterthwaite", "Kenward-Roger", "Residual", "Between-Within")
)String of the default covariance method.
(string)
degrees of freedom method.
The default covariance method is different for different degrees of freedom method. For "Satterthwaite" or "Between-Within", "Asymptotic" is returned. For "Kenward-Roger" only, "Kenward-Roger" is returned. For "Residual" only, "Empirical" is returned.