Differences
This shows you the differences between two versions of the page.
| Both sides previous revision Previous revision Next revision | Previous revision | ||
|
stats_item_distribution [2017/02/13 11:18] steveclarke |
stats_item_distribution [2017/03/06 14:04] (current) steveclarke |
||
|---|---|---|---|
| Line 1: | Line 1: | ||
| - | ====== Item Statistics and Results ====== | + | ====== Item Response Distribution Statistics and Results ====== |
| Table: **ceStatsExamQuestionDistribution** | Table: **ceStatsExamQuestionDistribution** | ||
| Line 7: | Line 7: | ||
| |StatsID|Unique Identifier for this set of Statistics| | |StatsID|Unique Identifier for this set of Statistics| | ||
| |QuestionID|ID of Item in the Bank| | |QuestionID|ID of Item in the Bank| | ||
| - | + | |Response|Response for Multiple Choice: \\ -2(Not Reached) \\ -1 (Bubbling Error) \\ 0 (Skipped) \\ 1 (A) \\ 2 (B) \\ … \\ \\ Response for Essay = point value awarded| | |
| - | Response Response for Multiple Choice = -2(Not Reached), -1 (Bubbling Error), 0 (Skipped), 1 (A), 2 (B), … | + | |Sequence|Sequence of Item on the Exam| |
| - | Response for Essay = point value awarded | + | |Decile1|Count of Candidates in Decile 1 (Exam) that match this response, see [[stats_concepts#decile|Decile]]| |
| - | Sequence Sequence of Item on the Exam | + | |
| - | |Decile1|Count of Candidates in Decile 1 (Exam) that match this response| | + | |
| |Decile2|Count of Candidates in Decile 2 (Exam) that match this response| | |Decile2|Count of Candidates in Decile 2 (Exam) that match this response| | ||
| |Decile3|Count of Candidates in Decile 3 (Exam) that match this response| | |Decile3|Count of Candidates in Decile 3 (Exam) that match this response| | ||
| Line 29: | Line 27: | ||
| |DistBottom50|Count of Candidates in bottom 50% (Exam) that match this response| | |DistBottom50|Count of Candidates in bottom 50% (Exam) that match this response| | ||
| |DistTop50|Count of Candidates in top 50% (Exam) that match this response| | |DistTop50|Count of Candidates in top 50% (Exam) that match this response| | ||
| - | |Biserial|{{:stats_biserial_distribution.png?|}}| | + | |Biserial|See [[stats_concepts#biserial_calculations|Biserials]]| |
| - | |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 \\ \\ {{:stat_rawpercent_candidate.png|}}| | + | |
| - | |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|{{:stat_valuepercent.png|}}| | + | |
| - | |Difficulty|x = Count of Correct Items on Exam \\ n = Count of Candidates on Exam \\ \\ {{:stat_difficulty_candidate.png|}}| | + | |
| - | |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 \\ \\ {{:stat_questiondiscrimination.png|}}| | + | |
| - | |BiserialExam|FIXME 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 \\ \\ {{:stat_pointbiserial.png|}}| | + | |
| - | |BiserialCorrectedExam|FIXME biserials| | + | |
| - | |PointBiserialCorrectedExam|FIXME biserials| | + | |
| - | |BiserialSection|FIXME 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 \\ \\ {{:stat_pointbiserial.png|}}| | + | |
| - | |BiserialCorrectedSection|FIXME biserials| | + | |
| - | |PointBiserialCorrectedSection|FIXME biserials| | + | |
| - | |BiserialCompetency|FIXME 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 \\ \\ {{:stat_pointbiserial.png|}}| | + | |
| - | |BiserialCorrectedCompetency|FIXME biserials| | + | |
| - | |PointBiserialCorrectedCompetency|FIXME 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 FIXME link| | + | |
| - | |Dichotomous|True if Item has one correct response worth 1 point and all other responses are incorrect worth 0 points.| | + | |
| - | |IncludeInStats|FIXME explain| | + | |
| - | + | ||
| |Quartile1|Count of Candidates in top 27% (Exam) that match this response| | |Quartile1|Count of Candidates in top 27% (Exam) that match this response| | ||
| |Quartile2|Count of Candidates in 27% to 50% (Exam) that match this response| | |Quartile2|Count of Candidates in 27% to 50% (Exam) that match this response| | ||
