Suppose that you plan to apply the one-mean z-interval procedure to obtain a 90% confidence interval for
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Suppose that you plan to apply the one-mean z-interval procedure to obtain a 90% confidence interval for a population mean, μ. You know that σ = 12 and that you are going to use a sample of size 9.
a. What will be your margin of error?
b. What else do you need to know in order to obtain the confidence interval?
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