Actuarial Notes

CAS Exam MAS-I Spring 2019, Question 26

Study guide: Exam MAS-I

For a general liability policy, loss amounts, Y, follow the Weibull distribution with probability density function:

f(y) = e^{-\left(\frac{y}{\theta}\right)^2}\left(\frac{2}{y}\right)\left(\frac{y}{\theta}\right)^2, \qquad y > 0

For reinsurance purposes we are interested in the distribution of the largest loss amount in a random sample of size 10, denoted by Y_{(10)}.

The 90^{\text{th}} percentile of Y_{(10)} is equal to k\theta for some constant k.

Calculate k.

  • A) Less than 1.2
  • B) At least 1.2, but less than 1.6
  • C) At least 1.6, but less than 2.0
  • D) At least 2.0, but less than 2.4
  • E) At least 2.4

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