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Partitioning Sums of Squares

Partitioning the Sums of Squares

Answers

  1. To compute a deviation score you subtract the mean. 15 - 10 = 5.

  2. To compute SSY, first compute the deviation scores Yes by subtracting the mean (10) from each number. Then square these values and add them together: (-8)2 + (-1)2 + 12 + 32 + 52 = 100

  3. SSY = SSY' + SSE; SSE = SSY - SSY' = 25.5 - 18.3 = 7.2

  4. Proportion of variation explained = SSY'/SSY, so as SSY' increases, so does the proportion of variation explained.

  5. Proportion explained = SSY'/SSY; SSY' = (.3)(20) = 6

  6. r2 is the proportion of variation explained. (.84)2 = .71

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  • 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()