Introduction to Sampling Distributions

The more samples, the closer the relative frequency distribution will come to the sampling distribution. The sampling distribution only equals the relative frequency distribution exactly when there is an infinite number of samples.
All of the given choices: Every statistic has a sampling distribution.
The standard deviation of the sampling distribution of the mean: The standard error of the mean is the standard deviation of the sampling distribution of the mean.

Callback before_footer in local_aigrade component should be migrated to new hook callback for core\hook\output\before_footer_html_generation

line 7225 of /lib/moodlelib.php: call to debugging()
line 7292 of /lib/moodlelib.php: call to {closure}()
line 71 of /lib/classes/hook/output/before_footer_html_generation.php: call to get_plugins_with_function()
line 987 of /lib/classes/output/core_renderer.php: call to core\hook\output\before_footer_html_generation->process_legacy_callbacks()
line 97 of /mod/book/tool/print/index.php: call to core\output\core_renderer->footer()