12) If a 95% two-sided confidence interval for u is to have a margin of error E = 0.45, then find the minimum required sample size. Assume o = 4.16.
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Step 1: The formula for the margin of error is: $$E = z_{\alpha/2} \frac{\sigma}{\sqrt{n}}$$ where: * E is the margin of error * $z_{\alpha/2}$ is the critical value for the given confidence level * $\sigma$ is the population standard deviation * n is the sample Show more…
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