question_statistics

0 rows


Description

Statistics for individual questions used in an activity.

Columns

Column Type Size Nulls Auto Default Children Parents Comments
id BIGINT 19 √ null
hashcode VARCHAR 40
timemodified BIGINT 19 null
questionid BIGINT 19 null
question.id question_statistics_erd_question_idR
slot BIGINT 19 √ null
subquestion SMALLINT 5 null
variant BIGINT 19 √ null
s BIGINT 19 0
effectiveweight DECIMAL 15,5 √ null
negcovar TINYINT 3 0
discriminationindex DECIMAL 15,5 √ null
discriminativeefficiency DECIMAL 15,5 √ null
sd DECIMAL 15,10 √ null
facility DECIMAL 15,10 √ null
subquestions LONGTEXT 2147483647 √ null
maxmark DECIMAL 12,7 √ null
positions LONGTEXT 2147483647 √ null
randomguessscore DECIMAL 12,7 √ null

Indexes

Constraint Name Type Sort Column(s)
PRIMARY Primary key Asc id
question_statistics_erd_question_id Performance Asc questionid

Relationships

Close relationships within degrees of separation