Unbiased estimator of a probability?

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SUMMARY

The discussion focuses on finding an unbiased estimator for the probability Pr(Σ x_i > x_{n+1}) where x_1, ..., x_{n+1} are independent and identically distributed (iid) Bernoulli random variables with parameter p. The user has struggled to establish that E(1 - Π x_i) serves as an unbiased estimator. Key insights reveal that the sum of Bernoulli variables follows a Binomial distribution, leading to the consideration of the probability of the difference between two Binomials, specifically Bi(n) - Bi(1) > 0.

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  • Understanding of Bernoulli random variables
  • Knowledge of Binomial distributions
  • Familiarity with unbiased estimators in statistics
  • Basic concepts of probability theory
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  • Research unbiased estimators in the context of Binomial distributions
  • Study the properties of Binomial distributions, particularly the relationship between Binomial and Bernoulli variables
  • Explore the method of moments for estimating probabilities
  • Learn about the Central Limit Theorem and its implications for Binomial distributions
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Statisticians, data scientists, and researchers working with probability theory and statistical estimation techniques will benefit from this discussion.

zli034
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Say, x_1{}... x_n_+_1{} are iid Bernoulli random variables with parameter p.

I want an unbiased estimator for probability Pr(\Sigma_{} x_1_._._._n{} > x_n_+_1{} )

I have failed to establish E(1 - \Pi x_i{}) is unbiased estimator for the probability.

Any hints? thanks.
 
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Note that (1) a sum of Bernoullis is Binomial, and (2) a Bernoulli is a special case of Binomial. So your probability becomes the probability of the difference between two Binomials, one with n trials and one with a single trial, being greater than zero, Bi(n) - Bi(1) > 0.
 
Thanks I haven't thought about this view point.
 

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