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Question
A sample of 12 items yields
= 48.5 grams and s = 1.5 grams. Assuming a normal distribution, construct a 90 percent confidence interval for the population mean weight.A. [47.722, 49.278]
B. [47.788, 49.212]
C. [45.806, 51.194]
D. [47.865, 49.135]
Answer
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