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单项选择题

The population follows an unknown distribution. The sample mean is 120 and the standard error of the sample mean is 6. The sample size is 120. The 90% confidence interval for the population mean is closest to:
A.108.24 to 131.76.
B.70.5 to 169.5.
C.110.1 to 129.9.

A.108.24
B.76.
B.70.5
C.5.
C.110.1
D.9.
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单项选择题 Which of the following statements are TRUE?

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