Question: From Formula 7.2, an estimate for margin of error for a 95% confidence interval is where n is the required sample size and p is

From Formula 7.2, an estimate for margin of error for a 95% confidence interval is

P(1 ) m = 2

where n is the required sample size and p̂ is the sample proportion. Since we do not know a value for p̂, we use a conservative estimate of 0.50 for p̂. Replace p̂ with 0.50 in the formula and simplify.

P(1 ) m = 2

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