A coin is assumed to be unfair with P(head) = p where p is unknown. To estimate p, you can toss a coin n times independently and observe the number of heads shown. Let X be the number of heads shown in n tosses. (a) Is p₁ = X/n an unbiased estimator for p? Show your work. (b) Is P2 = X2/n an unbiased estimator for p? Show your work. (c) Is p3 = (X+1)/(n + 2) an unbiased estimator for p? Show your work.
A coin is assumed to be unfair with P(head) = p where p is unknown. To estimate p, you can toss a coin n times independently and observe the number of heads shown. Let X be the number of heads shown in n tosses. (a) Is p₁ = X/n an unbiased estimator for p? Show your work. (b) Is P2 = X2/n an unbiased estimator for p? Show your work. (c) Is p3 = (X+1)/(n + 2) an unbiased estimator for p? Show your work.
A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
Section: Chapter Questions
Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...
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Transcribed Image Text:A coin is assumed to be unfair with P(head) = p where p is unknown. To estimate p, you can toss a
coin n times independently and observe the number of heads shown. Let X be the number of heads
shown in n tosses.
(a) Is p₁ = X/n an unbiased estimator for p? Show your work.
(b) Is P2 = X²/n an unbiased estimator for p? Show your work.
(c) Is P3 = (X+1)/(n+2) an unbiased estimator for p? Show your work.
(d) Consider the following results of 10 tosses of a coin:
H, T, T, T, T, H, T, H, T, T
Estimate the probability of head for this coin by using P1, P2, and P3. If you have to select one
of them, which estimate do you choose? Why?
(e) Estimate the standard error of your chosen estimate in part (d).
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