A 100(1-α)% Confidence Interval for the Population Mean μ Based $\bar{X}$

question 40

Multiple Choice

A 100(1-α) % confidence interval for the population mean μ based on a sample of size n with a sample mean $\bar{X}$ and a known population standard deviation σ is given by ________.

• A) \(\bar{x} \pm z_{a} / 2(n-1)(\sqrt{n})\)
• B)\(\bar{x} \frac{(\sigma / \sqrt{n})}{Z_{a / 2}}\)
• C)\(x 1-\bar{x} /(\sigma / \sqrt{n})\)
• D)\(\bar{x} \pm z_{a / 2}(\sigma / \sqrt{n})\)

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