Linggo, Pebrero 15, 2009

Long exam scores and statistics

Student numberScorePercentage
XXXX-XX00616.520.63%
XXXX-XX07650.563.13%
XXXX-XX08362.077.50%
XXXX-XX09250.062.50%
XXXX-XX09382.0102.50%
XXXX-XX09752.065.00%
XXXX-XX10272.090.00%
XXXX-XX11878.097.50%
XXXX-XX12976.095.00%
XXXX-XX17069.086.25%
XXXX-XX17488.0110.00%
XXXX-XX18060.575.63%
XXXX-XX20771.088.75%
XXXX-XX20968.585.63%
XXXX-XX21357.571.88%
XXXX-XX22985.0106.25%
XXXX-XX23765.081.25%
XXXX-XX25286.0107.50%
XXXX-XX25853.066.25%
XXXX-XX26655.068.75%
XXXX-XX28175.093.75%
XXXX-XX29066.082.50%
XXXX-XX30880.0100.00%
XXXX-XX30947.559.38%
XXXX-XX32951.063.75%
XXXX-XX38852.565.63%
XXXX-XX40072.090.00%
XXXX-XX42553.066.25%
XXXX-XX43170.588.13%
XXXX-XX45458.072.50%
XXXX-XX47860.575.63%
XXXX-XX47966.082.50%
XXXX-XX51776.595.63%
XXXX-XX55030.538.13%
XXXX-XX58568.585.63%
XXXX-XX61558.573.13%
XXXX-XX62278.097.50%
XXXX-XX63252.565.63%
XXXX-XX66156.570.63%
XXXX-XX66483.5104.38%
XXXX-XX66872.090.00%
XXXX-XX68254.067.50%
XXXX-XX68777.596.88%
XXXX-XX70278.097.50%
XXXX-XX70372.090.00%
XXXX-XX71761.576.88%
XXXX-XX75372.590.63%
XXXX-XX75468.585.63%
XXXX-XX75858.573.13%
XXXX-XX81962.578.13%
XXXX-XX82360.075.00%
XXXX-XX82440.050.00%
XXXX-XX83772.090.00%
XXXX-XX88054.568.13%
XXXX-XX88482.0102.50%
XXXX-XX90376.095.00%
XXXX-XX95421.526.88%
XXXX-XX96362.578.13%
XXXX-XX96652.565.63%
XXXX-XX97536.045.00%
XXXX-XX98243.554.38%
XXXX-XX99168.585.63%
XXXX-XX99729.036.25%
Scores and statistics
Mean score: 62.3651
Median score: 62.5
Standard deviation: 15.4389
Cardinality: 63
Number of failures: 8

Graph with nine stubs

Graph with seven stubs

A guide to the graphs: The actual instances of the scores are plotted as the frequencies below.  Higher concentrations and instances means there are clusterings of scores there.  The graphs are based on frequency distribution tables each with a different number of stubs.  The two vertical lines represent the passing score and the perfect score.  Engineering students, you should know that the area beneath the line can be taken using integration.

14 (na) komento:

  1. If you're wondering kung sino si Cariño diyan: XXXX-XX229. :D

    TumugonBurahin
  2. I took statistics! I can actually understand theses things.

    My my, it isn't a bell shaped curve. Sir be honest, when we were your students, was it worse than this?

    TumugonBurahin
  3. I can actually go back and make the graphs again. I believe I did it back then, too, but nobody in the team was very interested in the statistics. The first long test for your class definitely was not a bell curve. It was highly skewed to the left. *I wonder why...*

    TumugonBurahin
  4. I don't remember what happened anymore. Hahaha.

    TumugonBurahin
  5. ser dito niyo nalang po kami pinapapunta :> mahirap lang lagyan ng /UP itong site :p

    TumugonBurahin
  6. ay sir edge lahat na ba to yung 830-530 classes nyo? :))

    TumugonBurahin