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Unweighted models: stats::vcov() of the lm. Weighted models: the covariance matrix under SPSS frequency weights (residual variance with sum(w) - rank df), whose square-rooted diagonal equals the Std.Error column of summary().

Usage

# S3 method for class 'linear_regression'
vcov(object, ...)

Arguments

object

A linear_regression result (ungrouped, listwise).

...

Passed to stats::vcov().

Value

A square numeric matrix.