Maximizing the length of the confidence interval











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Let $X_1,X_2,...,X_n$ be iid $Bern(θ)$.



(a) Determine the sample size such that the length of 95% confidence interval is at most 0.04.



(b) To reduce the cost, assume that the half of the sample is only available. Determine the significance level such that the the length of 95% confidence interval is at most 0.04.



Well, (a) is quite easy. However, I don't even know how should I start (b). Can you help me solve (b)?










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    down vote

    favorite












    Let $X_1,X_2,...,X_n$ be iid $Bern(θ)$.



    (a) Determine the sample size such that the length of 95% confidence interval is at most 0.04.



    (b) To reduce the cost, assume that the half of the sample is only available. Determine the significance level such that the the length of 95% confidence interval is at most 0.04.



    Well, (a) is quite easy. However, I don't even know how should I start (b). Can you help me solve (b)?










    share|cite|improve this question
























      up vote
      0
      down vote

      favorite









      up vote
      0
      down vote

      favorite











      Let $X_1,X_2,...,X_n$ be iid $Bern(θ)$.



      (a) Determine the sample size such that the length of 95% confidence interval is at most 0.04.



      (b) To reduce the cost, assume that the half of the sample is only available. Determine the significance level such that the the length of 95% confidence interval is at most 0.04.



      Well, (a) is quite easy. However, I don't even know how should I start (b). Can you help me solve (b)?










      share|cite|improve this question













      Let $X_1,X_2,...,X_n$ be iid $Bern(θ)$.



      (a) Determine the sample size such that the length of 95% confidence interval is at most 0.04.



      (b) To reduce the cost, assume that the half of the sample is only available. Determine the significance level such that the the length of 95% confidence interval is at most 0.04.



      Well, (a) is quite easy. However, I don't even know how should I start (b). Can you help me solve (b)?







      confidence-interval bernoulli-numbers






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      share|cite|improve this question











      share|cite|improve this question




      share|cite|improve this question










      asked Dec 5 at 13:10









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