Add third parameter (theta) to the Weibull equation

[ahaselsteiner]

I'm submitting a ...

• [x] bug report
• [ ] feature request
• [ ] code improvement request

Expected behavior

How should it work (with the bug fixed or the feature implemented)? We use a 3-parameter Weibull pdf, consequently the equatinon should have 3 parameters.

Screenshot

Actual behavior

How does it currently work (with the bug causing problems or without the feature)? The shown equation has 2 parameters.

Screenshot

Steps to reproduce the problem (how to see the actual behavior)

1. 2. 3.

[ahaselsteiner]

The equation should be the same as in the papers by Haselsteiner (2017) and Vanem and Bitner-Gregersen (2012). Consequently, we should use alpha, beta and gamma (scale, shape and location respectively).

[ahaselsteiner]

New equation:

View model:

View pdf report:

[ahaselsteiner]

Done and merged.