Create unit test for checking BMD censoring CI widths stay the same

[sedavid01]

Goal: Add an additional unit test to the BMD censoring tests to ensure that the CI width stays the same before and after censoring. From the conc-response plots the CI regions look slightly off (i.e. change in widths) before and after censoring. This is meant to ensure this is just an optical illusion not an actual change in CI widths as the censoring shift should not have that kind of an impact.

Needs:

• Include a unit test comparing the width between the CI before censoring and the CI after censoring.

Other suggestions:

• You may also consider doing a double check that the distance between the BMD and lower CI bound, and likewise with the BMD and the upper CI bound, stay the same before and after censoring.

[sedavid01]

[sedavid01]