We Draw a Random Sample of Size 25 from the Normal

question 128

Multiple Choice

We draw a random sample of size 25 from the normal population with variance 2.4. If the sample mean is 12.5, what is a 99% confidence interval for the population mean?

• A) [11.2600, 13.7400]
• B) [11.3835, 13.6165]
• C) [11.7019, 13.2981]
• D) [11.7793, 13.2207]

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