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Overview Item Statistic

This FR is associated with the rework of the statistics functionality [[https://docu.ilias.de/goto_docu_wiki_wpage_3529_1357.html]]

1 Initial Problem

The basic statistical information that is currently provided within the test object does not give a good overview. The test authors cannot immediately get an résumé of the important key figures in order to make a consequent statement directly after the test and to increase the quality of the test in general. 

2 Conceptual Summary

This concept is based on the great work of Fred Neumann.

The Interface allows the user in the to export the statistics in two types: Microsoft Excel,  Comma Separated Value (CSV). The exported  Data include the following values:  Question ID,  Question Title,  Question Type,  Compulsory,  Assigned,  Answered,  Max. Points,  Ø Points,  Percent,  Discrimination Index,  Facility Index,  Standard Deviation


A filtering option allows the user to filter for the following values:

• Question ID
• Question Title
• Question Type
• Facility Index
• Discrimination Index 

The selectable values for the filtering options "Facility Index" and "Discrimination Index" should be on  a "neutral" position at start, like "Any Facility Index" and  "Any Discrimination Index ". 


An overview in table form presents the desired statistic (like in survey). The sortable default values are: ID, Title, Type, Answered, Ø Points, Percent, Discrimination Index, Facility Index

All desired values for the statistic can be added by the user, by clicking on columns an choosing from the following list: 

•  Question ID
•  Question Title
•  Question Type
•  Compulsory
•  Assigned
•  Answered
•  Max. Points
•  Ø Points
•  Percent
•  Discrimination Index
•  Facility Index
•  Standard Deviation

 
The displayed overview is generated according to the user setting “Scoring Multiple Passes”

3 User Interface Modifications

3.1 List of Affected Views

Introduce new tab: 

Test > Statictics > Overview Item Statistic

3.2 User Interface Details

{For each of these views please list all user interface elements that should be modified, added or removed. Please provide the textual appearance of the UI elements and their interactive behaviour.}

3.3 New User Interface Concepts

{If the proposal introduces any completely new user interface elements, you might consult UI Kitchen Sink in order to find the necessary information to propose new UI-Concepts. Note that any maintainer might gladly assist you with this.}

4 Technical Information

{The maintainer has to provide necessary technical information, e.g. dependencies on other ILIAS components, necessary modifications in general services/architecture, potential security or performance issues.}

5 Contact

• Author of the Request: Rabah, Rachid [rabah]
• Maintainer: Heyser, Björn [bheyser]
• Implementation of the feature is done by: {The maintainer must add the name of the implementing developer.}

6 Funding

If you are interest in funding this feature, please add your name and institution to this list.

• Universität Bonn

7 Discussion

Strassner, Denis [dstrassner], 18 JUN 2019: On behalf of SIG EA: We appreciate this suggestion.

Kunkel, Matthias [mkunkel], 24 JUN 2019 : I am not a native speaker but I guess the label should be "Percentage" instead of "Percent". And "Answered by" might be less mistakable than "Answered".

JourFixe, ILIAS [jourfixe], 15 JUL 2019 : We highly appreciate this suggestion and schedule it for 6.0. Please consider Matthias' suggestions for changed labels.

8 Implementation

{The maintainer has to give a description of the final implementation and add screenshots if possible.}

Test Cases

Test cases completed at {date} by {user}

• {Test case number linked to Testrail} : {test case title}

Approval

Approved at {date} by {user}.