advertisement

According to Infoplease, 18.8% of the luxury cars manufactured in 2003 were silver. A large car dealership typically sells 50 luxury cars a month. If X represents the number of silver luxury cars sold in a typical month and the model is Binomial, what is the expected value of X? 10 1. 7.63 2. 9.4 3. 40.6 4. 2.76 0% 1. 0% 2. 0% 3. 0% 4. According to Infoplease, 18.8% of the luxury cars manufactured in 2003 were silver. A large car dealership typically sells 50 luxury cars a month. If X represents the number of silver luxury cars sold in a typical month and the model is Binomial, what is the standard deviation of X? 10 1. 7.63 2. 9.4 3. 40.6 4. 2.76 0% 1. 0% 2. 0% 3. 0% 4. Suppose the probability of a dropped cell phone call is 0.05. If we want to determine the probability that 2 out of the next 20 calls placed on a cell will drop, what probability model should we use? 10 1. 2. 3. 4. 5. Equally likely Binomial Complementary Geometric Subjective 0% 1 0% 0% 2 3 0% 0% 4 5 Suppose the probability of a dropped cell phone call is 0.05. What is the probability that 2 out of the next 20 calls placed on a cell phone will drop? 10 1. 2. 3. 4. 5. 0.925 0.736 0.189 0.075 0.567 0% 1. 0% 0% 2. 3. 0% 0% 4. 5. In a taste test of Pepsi vs Coke, suppose 25% of tasters can distinguish between the colas. If 20 tasters participate in a test by drinking from 2 cups in which 1 cup contains Coke and the other cup contains Pepsi, what is the probability that at least 5 (that is, 5 or more) will correctly identify the colas? 10 1. 2. 3. 4. 5. 0.617 0.383 0.415 0.585 0.202 0% 1. 0% 0% 2. 3. 0% 0% 4. 5. If 65% of college students have opened a new credit card account within the past year, how many students would you expect to survey before finding one who has not opened a new account in the past year? 10 1. 2. 3. 4. 5. 0.65 1.54 2.86 0.35 6.5 0% 1. 0% 0% 2. 3. 0% 0% 4. 5. Suppose 65% of college students have opened a new credit card account within the past year. If you survey students in the brickyard, what is the probability that the first student who has not opened a new credit card account in the past year is the 3rd student that you survey? 10 1. 2. 3. 4. 5. 0.275 0.148 0.0796 0.043 0.096 0% 1. 0% 0% 2. 3. 0% 0% 4. 5. Dewey, Lie, and Howe, Inc., a tax preparation firm, makes fraudulent claims on 47% of the tax returns that they file with the IRS. If the IRS audits Dewey, Lie, and Howe, Inc., what is the probability that the first fraudulent return found by the IRS is the 5th return that they examine? 10 1. 2. 3. 4. 5. 0.023 0.042 0.026 0.037 0.094 0% 1. 0% 0% 2. 3. 0% 0% 4. 5.