GLM.ModelRefinement — BattleActs Exam 8 Forum

Gini Index

Lcparga1 — Fri, 22 Aug 2025 15:19:11 +0000

Hello,

Does having a higher Gini Index mean the rating plan is able to differentiate the best and worst risks better than a rating plan that has a smaller Gini index?

Thanks in advance!

Excel Problem: GLM_ModelRefinement1

kmo484 — Tue, 27 Aug 2024 12:23:05 +0000

I may be missing something obvious, but can you explain where the $45,000 comes from in the solution for part a? How did we know it was the upper range of Vehicle Value?

Unscaled Deviance is independent

jmoore13 — Tue, 18 Oct 2022 23:01:54 +0000

I'm confused by why exactly Goldburd uses the term "independent" when talking about the dispersion parameter in unscaled deviance. Unscaled Deviance literally is reliant on the value of the dispersion parameter in the formula, so by definition it isn't independent and depends on what the dispersion parameter is.

I get that they're saying without the dispersion parameter, we couldn't compare distributions since Scaled Deviance doesn't account for difference in distributions andthe dispersion paraemter brings that in, but is there a reason they're using "independent" that I'm not understanding?

Binned residuals

emelnd — Thu, 18 Aug 2022 14:22:00 +0000

When you bin the residuals into groups with the same sum of working weights, is the process order by working residuals and keep adding until you get close to the target size, or do you combine random data points to get to the target size regardless of the working residual value?

Hinge function

emelnd — Wed, 17 Aug 2022 15:30:11 +0000

What's a hinge function?

2018 Fall Q6 F Statistics

jiangz12 — Wed, 11 Aug 2021 20:10:34 +0000

Hello,

Based on the F Statistic formula, The numerator is the Unscaled Deviance =phi * 2*(ll sat - ll model) .

Therefore in this question Ds = 2(-1000-(-1500))*1.75 = 1750, and Db = 2(-1000-(-1465))*1.75 = 1627.5

and F = (1750-1627.5)/(2*1.75) = 35

The sample answer seem to be using the scaled deviance, leading to an answer of 20. Would you please advise which is correct, the paper or the question? Or is there a reason why the scaled deviance is used in this question instead of the unscaled deviance.

Thank you lots!

F17 Q5 - Quintile Plots

stratthixx — Sat, 19 Jun 2021 16:03:59 +0000

I think this question is in the wrong battle quiz. The material is covered in a later section and should be in Battle Quiz #2. If I am wrong, could you point me to where I could find the material? Thanks.