Statistics for Business & Economics
12th Edition
ISBN: 9781285528830
Author: David R. Anderson
Publisher: Cengage Learning US
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Chapter 5.7, Problem 58E
The Troubled Asset Relief Program (TARP), passed by the U.S. Congress in October 2008, provided $700 billion in assistance for the struggling U.S. economy. Over $200 billion was given to troubled financial institutions with the hope that there would be an increase in lending to help jump-start the economy. But three months later, a Federal Reserve survey found that two-thirds of the banks that had received TARP funds had tightened terms for business loans (The Wall Street Journal, February 3, 2009). Of the 10 banks that were the biggest recipients of TARP funds, only 3 had actually increased lending during this period.
| Increased Lending | Decreased Lending |
| BB&T | Bank of America |
| Sun Trust Banks | Capital One |
| U.S. Bancorp | Citigroup Fifth Third Bancorp J.P. Morgan Chase Regions Financial Wells Fargo |
For the purposes of this exercise, assume that you will randomly select 3 of these 10 banks for a study that will continue to monitor bank lending practices. Let x be a random variable indicating the number of banks in the study that had increased lending.
- a. What is f(0)? What is your interpretation of this value?
- b. What is f(3)? What is your interpretation of this value?
- c. Compute f(1) and f(2). Show the
probability distribution for the number of banks in the study that had increased lending. What value of x has the highest probability? - d. What is the probability that the study will have at least one bank that had increased lending?
- e. Compute the
expected value , variance, and standard deviation for the random variable.
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Chapter 5 Solutions
Statistics for Business & Economics
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