According to a survey, one out of four investors in the United States has exchange-traded funds in
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Question:
According to a survey, one out of four investors in the United States has exchange-traded funds in their portfolios ( USA Today , 11 January 2007). Consider a random sample of 20 investors drawn from the US population.
a. Compute the probability that at least 2 investors have exchange-traded funds in their portfolios.
b. If you found that exactly 12 investors have exchange-traded funds in their portfolios, would you doubt the accuracy of the survey results?
c. Compute the expected number of investors who have exchange-traded funds in their portfolios.
Related Book For
Intermediate Accounting
ISBN: 978-0077400163
6th edition
Authors: J. David Spiceland, James Sepe, Mark Nelson
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