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.

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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).
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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