Differences

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--- stats_item [2017/03/21 11:17]
steveclarke
+++ stats_item [2018/04/10 11:17] (current)
72.38.112.148
@@ Line 19: / Line 19: @@
 |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|}}|
+|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 bottom27% of all Candidates taking the Exam. \\ n = Count of Candidates \\ \\ {{:stat_questiondiscrimination.png|}}|
 |BiserialExam|Future|
 |PointBiserialExam|See [[stats_concepts#biserial_calculations|Biserials]]|