Quiz Statistics - Question Pool Question Stats

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John.S.971
John.S.971 Posts: 11 🌱
edited January 24 in Community Corner

Could someone please explain why the standard deviation, discrimination index, and point biserial data cannot be generated on quizzes that use a Question Pool? I understand that this is a known issue and that use of the insights portal can be used as an alternative, but I need assistance explaining it to an inquisitive instructor. Any assistance would be greatly appreciated.

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  • Syed.H.393
    Syed.H.393 Posts: 36
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    Hi @John.S.971

    Thank you for reaching Brightspace Community! 

    Standard Deviation, Discrimination Index and Point Biserial columns will show N/A if there is only one data point, that is only one user with a first attempt.

    Point Biserial column for all question types but True/False and Multiple Choice Questions will show N/A.

    Standard Deviation, Discrimination Index and Point Biserial columns will show N/A if they are Random Questions from a Question Pool.

    Should you have any questions or concerns please let us know.

    Best Regards,

    Syed Hasan

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  • John.S.971
    John.S.971 Posts: 11 🌱
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    @Syed.H.393

    Thank you for commenting on my question, the information is helpful and much appreciated. For my understanding, I would like to know why Standard Deviation, Discrimination Index and Point Biserial columns show as N/A if they are Random Questions from a Question Pool. Is there an explanation for why D2L does this?

    Kind regards,

    John

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