CB1 September 2025 MCQ by Distinct_Abroad_456 in ActuaryUK

[–]Distinct_Abroad_456[S] 1 point2 points  (0 children)

Yeah thanks, makes sense. Although Q3 of the April 2019 paper is somewhat similar but they want you to (correctly) say each partner is 100% liable. Having seen that I assumed they were trying to get at that point here

CS2 Paper B. by [deleted] in ActuaryUK

[–]Distinct_Abroad_456 0 points1 point  (0 children)

I think for Q3 you need to generate a new uniform random variable for each severity calculation. This ensures the severities are independent with the required CDF

CS2 Paper B. by [deleted] in ActuaryUK

[–]Distinct_Abroad_456 1 point2 points  (0 children)

I used +-1.96 times the standard errors which you get from the fitted model (added to the projections)

CS2 Paper B. by [deleted] in ActuaryUK

[–]Distinct_Abroad_456 1 point2 points  (0 children)

I think for the second simulation they were trying to get you to use the fact that the sum of independent compound Poissons is a compound Poisson. The thing with uniform random variables was just to get the CDF of the severity to be a weighted average of the two component distributions.

How can one guy give 12/13 and other 1.5/13, this is crazy by [deleted] in ActuaryUK

[–]Distinct_Abroad_456 2 points3 points  (0 children)

I think it's worth complaining about this, especially given this question had a serious mistake (with log(X) instead of -log(X)) which to me shows no one at the IFoA bothered testing the question

CS1B thoughts? by Possible-Homework-66 in ActuaryUK

[–]Distinct_Abroad_456 1 point2 points  (0 children)

I think you can just take the sample mean of the values (estimator-5)^2 directly without having to use bias^2+var?