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Computing Arithmetic Mean for Questions

1 Initial Problem

Single Choice Questions do not offer an arithmetic mean. Typically they do not offer the level / scale of measurement allowing for it. 

2 Conceptual Summary

If questions have the measurement level i.e. a Rating or a Likert scale, users should be able to activate a checkbox "Compute Arithmetic Mean". 
The Weighted Avarage is computed as: 

1. Multiply the number of individuals selecting each answer option by the corresponding scale value 
2. Make a sum total of the results of those calculations 
3. Divide that result by the total number of responses to the question

The selections of the neutral option will not be factored in but left out. 
In the results the Arithmetic Mean should be displayed. 

3 User Interface Modifications

3.1 List of Affected Views

• Edit Forms of Single Choice, Multiple Choice, Matrix Question, Metric Question 
• Results screens

3.2 User Interface Details

3.3 New User Interface Concepts

None

4 Technical Information

No technical issues.

No privacy or security issues.

5 Contact

• Author of the Request: {Please add your name.}
• Maintainer: {Please add your name before applying for an initial workshop or a Jour Fixe meeting.}
• 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.

• …

7 Discussion

Killing, Alexander [alex] 16 May 2019: I support the idea.

JourFixe, ILIAS [jourfixe], 29 JUL 2019 : We highly appreciate this suggestion and schedule the feature for 6.0. Please place the new setting above the Input for answers (one below).

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}.