The Approximate 95% Confidence Interval for a Population Mean Is $x \pm \sigma / \sqrt { n }$

question 47

Multiple Choice

The approximate 95% confidence interval for a population mean is:

• A)
• \(x \pm \sigma / \sqrt { n }\)
• B)
• \(x \pm s / \sqrt { n }\)
• C)
• \[X \pm 2 \sigma / \sqrt { n }\]
• D)
• \(x \pm 2 s l \sqrt { n }\)

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