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OpenStudy (anonymous):
Suppose that a researcher approximates the density of CAD/USD exchange rate by x~N(1.00,0.0004) (a) Find a value of Xc such that X will lie within μ+/-Xc 90% of the time. (b) Find a value of Xc such that X will lie within μ+/-Xc 95% of the time.
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