Actuarial Notes

CAS Exam MAS-I Fall 2018, Question 25

Study guide: Exam MAS-I

You draw a large number of independent samples, each of size n = 4, from a uniform distribution on (0, \theta). You want to use the second smallest value in each sample as an estimate for the mean.

The density for the k^{\text{th}} order statistic of a sample is given as:

g_k(y_k) = \frac{n!}{(k-1)!(n-k)!}[F(y_k)]^{k-1}[1 - F(y_k)]^{n-k} f(y_k)

Calculate the expected bias of this estimate.

  • A) -\dfrac{4\theta}{5}
  • B) -\dfrac{4\theta}{7}
  • C) -\dfrac{\theta}{10}
  • D) -\dfrac{\theta}{30}
  • E) The answer is not given by (A), (B), (C), or (D)

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