Independent Samples of N₁ = 400 and N₂ = 400

Short Answer

Independent samples of n₁ = 400 and n₂ = 400 observations were selected from binomial populations 1 and 2, and x₁ = 100 and x₂ = 127 successes were observed.
a. What is the best point estimator for the difference (p₁ - p₂) in the two binomial proportions?
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b. Calculate the approximate standard error for the statistic used in part (a).
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c. What is the margin of error for this point estimate?
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