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Item Statistics and Results
Table: ceStatsExamQuestionGroup
Aggregate of Item Stats, grouped by Item Group.
| Field | Description |
|---|---|
| StatsID | Unique Identifier for this set of Statistics |
| GroupID | ID of Item Group Items are linked to |
| QtyQuestions | Count of all Items on Exam in this Group |
| QtyCorrect | Total of all QtyCorrect for all Items in this Group |
| QtySkipped | Total of all QtySkipped for all Items in this Group |
| QtyIncorrect | Total of all QtyIncorrect for all Items in this Group |
| RawPercent | x = Count of Correct Items in Group n = Count of Candidates on Exam  |
| RawPercent |
n = Count of Candidates on Exam k = Count of Items in Group x/(n*k*100)|
| ValueCorrect | Total of all ValueCorrect for all Items in this Group |
| ValueSkipped | Total of all ValueSkipped for all Items in this Group |
| ValueIncorrect | Total of all ValueIncorrect for all Items in this Group |
ValueTotal (ValueCorrect + ValueSkipped + ValueIncorrect) ValuePercent ValueTotal/(ValueMax*100) Difficulty x = Count of Correct Items in Group n = Count of Candidates on Exam k = Count of Items in Group x/(n*k) ValueMax Maximum achievable points for Group from sum off all Value Max of Items in Group ValueHigh Highest ValueTotal achieved by a Candidate for this Group ValueLow Lowest ValueTotal achieved by a Candidate for this Group ValueMean Mean (average) ValueTotal achieved by a Candidate for this Group ValueStdev Standard Deviation of ValueTotal for all Candidates for this Group ValueVariance Variance of ValueTotal for all Candidates for this Group ValueMedian Median (middle) ValueTotal for all Candidates for this Group ValueMode Mode (most frequent) ValueTotal for all Candidates for this Group
| Sequence | Sequence of Item on the Exam |
| ValueMax | Maximum achievable points for Item |
| QtyCorrect | Total of all QtyCorrect for Item for all Candidates |
| QtySkipped | Total of all QtySkipped for Item for all Candidates |
| QtyIncorrect | Total of all QtyIncorrect for Item for all Candidates |
| RawPercent | x = Count of Correct Items on Exam n = Count of Candidates on Exam |
| ValueCorrect | Total of all ValueCorrect for Item for all Candidates |
| ValueSkipped | Total of all ValueSkipped for Item for all Candidates |
| ValueIncorrect | Total of all ValueIncorrect for Item for all Candidates |
| ValueTotal | (ValueCorrect + ValueSkipped + ValueIncorrect) |
| ValuePercent |  |
| Difficulty | x = Count of Correct Items on Exam n = Count of Candidates on Exam  |
| QuestionDiscrimination | A value between -1 and 1 Q1 is the Count of Candidates who responded correctly to Item whose Value total is in the top 27% of all Candidates taking the Exam. Q4 is the Count of Candidates who responded correctly to Item whose Value total is in the top 27% of all Candidates taking the Exam. n = Count of Candidates  |
| BiserialExam |  biserials |
| PointBiserialExam | m1 = Mean of correct on Exam for all Candidates that answered correctly. m0 = Mean of correct on Exam for all Candidates that answered incorrectly. n1 = Count of all Candidates that answered correctly. n0 = Count of all Candidates that answered incorrectly. s = Standard deviation of Candidate correct on Exam n = Total number of Candidates on Exam  |
| BiserialCorrectedExam | biserials |
| PointBiserialCorrectedExam | biserials |
| BiserialSection | biserials |
| PointBiserialSection | m1 = Mean of correct on Exam for all Candidates that answered correctly. m0 = Mean of correct on Exam for all Candidates that answered incorrectly. n1 = Count of all Candidates that answered correctly. n0 = Count of all Candidates that answered incorrectly. s = Standard deviation of Candidate correct on Exam n = Total number of Candidates on Exam |
| BiserialCorrectedSection | biserials |
| PointBiserialCorrectedSection | biserials |
| BiserialCompetency | biserials |
| PointBiserialCompetency | m1 = Mean of correct on Exam for all Candidates that answered correctly. m0 = Mean of correct on Exam for all Candidates that answered incorrectly. n1 = Count of all Candidates that answered correctly. n0 = Count of all Candidates that answered incorrectly. s = Standard deviation of Candidate correct on Exam n = Total number of Candidates on Exam |
| BiserialCorrectedCompetency | biserials |
| PointBiserialCorrectedCompetency | biserials |
| ValueLow | Lowest ValueTotal achieved by a Candidate for this Item |
| ValueHigh | Highest ValueTotal achieved by a Candidate for this Item |
| ValueMean | Mean (average) ValueTotal achieved by a Candidate for this Item |
| ValueStdev | Standard Deviation of ValueTotal for all Candidates for this Item |
| ValueVariance | Variance of ValueTotal for all Candidates for this Item |
| ValueMedian | Median (middle) ValueTotal for all Candidates for this Item |
| ValueMode | Mode (most frequent) ValueTotal for all Candidates for this Item |
| QtyCorrectTop50 | Count of Candidates who responded correctly to Item whose Value total was in top 50% of all Candidates taking Exam |
| QtyCorrectBottom50 | Count of Candidates who responded incorrectly to Item whose Value total was in top 50% of all Candidates taking Exam |
| TimeTotal | Total Time for all Candidates on this Item. Used in Online testing link |
| Dichotomous | True if Item has one correct response worth 1 point and all other responses are incorrect worth 0 points. |
| IncludeInStats | explain |
