Solution

ID: past-exam-of-the-simulation-and-statistical-programming-course-of-the-university-of-oxford/2023/1/a/ii/solution

Apply Chebyshev's inequality to the Monte Carlo estimator:
Thus suffices, giving
This is a finite-sample probability guarantee for every target satisfying the given variance assumption. It is a sufficient sample count supplied by the inequality, rather than a claim that every such target actually needs a million draws.

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