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More on Normal Distributions

  1. 68% of the distribution is within one standard deviation of the mean. 40 + 5 = 45, 40 - 5 = 35

  2. 95% of the distribution is within 1.96 standard deviations of the mean. You can round 1.96 to 2 to approximate. 20 - 2(3) = 14, 20 + 2(3) = 26

  3. Use the "Calculate Area for a given X" calculator and enter Mean = 5, SD = 2, Above 3. You will get 0.8413.

  4. Var = 100, so SD = 10. Use the "Calculate X for a given Area" calculator and enter Mean = 120, SD = 10, Shaded area = .35. Click below, and you will get 116.15.

  5. Use the "Calculate X for a given Area" calculator and enter Mean = 38, SD = 6, Shaded area = .80. Click below, and you will get 43.05, meaning a score of 43.

  6. Use the "Calculate Area for a given X" calculator and enter Mean = 38, SD = 6, Between 30 and 45. You will get 0.787, meaning 78.7%.

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()