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A business journal investigation of the performance and timing of corporate acquisitions discovered that in a random sample of 2,963 firms, 610 announced one or more acquisitions during the year 2000. Does the sample provide sufficient evidence to indicate that the true percentage of all firms that announced one or more acquisitions during the year 2000 is less than 25%? Use a =0.01to make your decision.
What are the hypotheses for this test
H0: p=0.25Ha: p<0.25
What is the rejection region?
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During the 12-month period the couple owned the stock, Cisco Systems paid no dividends. Calculate the Hernandez's total return for this investment.
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Suppose that X and Y are continuous random variables with joint pdf (probability distribution function). Please give step-by-step process for solving the following problem.
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What is the approximate probability that the blood test will be positive and so at least one person has the disease? Suppose that the blood test yields a positive result.
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