Question 370298: The 90% confidence interval for a population mean is (1.2, 5.2).
A. Then the population mean is 3.2, and the margin of error is 2.
B. Then the sample mean is 3.2, and the margin of error is 2.
C. Then the sample mean is 2, and the margin of error is 3.2.
D. Then the population mean is 2, and the margin of error is 3.2.
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! The 90% confidence interval for a population mean is (1.2, 5.2).
ME = (1/2)(5.2-1.2) = (1/2)(4) = 2
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Mean = (5.2+1.2)/3 = 6.4/2 = 3.2
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Answer: A
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Cheers,
Stan H.
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A. Then the population mean is 3.2, and the margin of error is 2.
B. Then the sample mean is 3.2, and the margin of error is 2.
C. Then the sample mean is 2, and the margin of error is 3.2.
D. Then the population mean is 2, and the margin of error is 3.2.
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