====== Item Statistics and Results ======
Table: **ceStatsExamSection**

Aggregate of  [[Stats_Item|Item Stats]], grouped by Section.  Also derives some values by aggregating from Candidate performance by Section from [[Stats_Registration_Section|Registration Section Stats]].


^Field^Description^
|StatsID|Unique Identifier for this set of Statistics|
|SectionID|ID of Section all Items are a member of|
|QtyQuestions|Count of all Items in this Section|
|QtyCorrect|Total of all QtyCorrect for all Items in this Section|
|QtySkipped|Total of all QtySkipped for all Items in this Section|
|QtyIncorrect|Total of all QtyIncorrect for all Items in this Section|
|RawPercent|x = Count of Correct Items in Section \\ n = Count of Candidates on Exam \\ k = Count of Items in Section \\ \\ {{:stat_rawpercent.png|}}|
|ValueCorrect|Total of all ValueCorrect for all Items in this Section|
|ValueSkipped|Total of all ValueSkipped for all Items in this Section|
|ValueIncorrect|Total of all ValueIncorrect for all Items in this Section|
|ValueTotal|(ValueCorrect + ValueSkipped + ValueIncorrect)|
|ValuePercent|{{:stat_valuepercent.png|}}|
|Difficulty|x = Count of Correct Items in Section \\ n = Count of Candidates on Exam \\ k = Count of Items in Section \\ \\ {{:stat_difficulty.png|}}|
|RawHigh|Highest QtyCorrect achieved by a Candidate for this Section|
|RawLow|Lowest QtyCorrect achieved by a Candidate for this Section|
|RawMean|Mean (average) QtyCorrect achieved by a Candidate for this Section|
|RawVariance|Variance of QtyCorrect for all Candidates for this Section|
|RawStdev|Standard Deviation of QtyCorrect for all Candidates for this Section|
|ValueMax|Maximum achievable points for Group from sum off all Value Max of Items in Section|
|ValueHigh|Highest ValueTotal achieved by a Candidate for this Section|
|ValueLow|Lowest ValueTotal achieved by a Candidate for this Section|
|ValueMean|Mean (average) ValueTotal achieved by a Candidate for this Section|
|ValueStdev|Standard Deviation of ValueTotal for all Candidates for this Section|
|ValueVariance|Variance of ValueTotal for all Candidates for this Section|
|ValueMedian|Median (middle) ValueTotal for all Candidates for this Section|
|ValueMode|Mode (most frequent) ValueTotal for all Candidates for this Section|
|KuderRichardson20|k = Count of Items in Section \\ Total Section Variance = Variance of Candidate Raw Scores for Section \\ Sum of p*q = sum of all items p (difficulty) * q (1-p) for all items in Section \\ \\ {{:stat_kr20.png|}}|
|StandardErrorMean|s = StDev of QtyCorrect for Section \\ n = Count of Candidates \\ {{:stat_stderr.png|}}|
|StandardErrorMeasurement|s = StDev of QtyCorrect for Section \\ n = Count of Candidates \\ kr20 = Kuder Richardson 20 \\ {{:stat_stderrmeasurement.png|}}|
|Skewness|n = Count of Candidates \\ xi = QtyCorrect for each Candidate in Section \\ x  = Mean of QtyCorrect in Section \\ s = StDev of QtyCorrect in Section \\ \\ {{:stat_skewness_1.png|}} \\ \\ Calculate Population Skewness using Sample Skewness \\ \\ {{:stat_skewness_2.png|}}|
|Kurtosis|n = Count of Candidates \\ xi = QtyCorrect for each Candidate in Section \\ x  = Mean of QtyCorrect for Section \\ s = StDev of QtyCorrect for Section \\ \\ Calculate Sample Kurtosis {{:stat_kurtosis_1.png|}} \\ \\ Calculate Population Kurtosis using Sample Kurtosis \\ \\ {{:stat_kurtosis_2.png|}}|