[jmgirard]

standard_error() returned NULL for objects from datawizard::skewness() and datawizard::kurtosis(), because it read an SE attribute while datawizard returns an SE column. It now reads the column, and falls back to the attribute for older objects. It also adds methods for the new datawizard_skewness and datawizard_kurtosis classes (easystats/datawizard#715).

standard_error(datawizard::skewness(mtcars$mpg))
#> [1] 0.394771

[Copilot]

🟡 Changes recommended

Bootstrap tests should skip when the optional boot package is unavailable.

1 open issue

• Skip bootstrap kurtosis test when boot package is unavailable · New

What changed in this PR

Updates standard_error() to support current and legacy datawizard skewness and kurtosis outputs.

Changes:

• Reads SE columns with legacy attribute fallback.
• Adds methods for new datawizard_* classes.
• Adds tests, NEWS documentation, namespace registrations, and a version bump.

File	Summary
tests/​testthat/​test-skewness_kurtosis.R	Tests supported inputs, classes, and attribute forms.
R/​methods_skewness_kurtosis.R	Implements standard-error extraction.
NEWS.md	Documents the fix.
NAMESPACE	Registers new S3 methods.
DESCRIPTION	Increments the development version.

_{Review effort: Lite}

[jmgirard]

#1288 (review)

• tests/testthat/test-skewness_kurtosis.R:1 (skip the bootstrap test without boot): fixed in 947a012.