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Multiple Choice Questions 27.A discrete probability distribution: A. is a listing of all possible values of the random variable. B. assigns a probability to each possible value of the random variable. C. can assume values between -1 and +1. D. is independent of the parameters of the distribution. 28.The number of male babies in a.
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Short Answer Questions 129.In Osaka, Japan, stock brokers earn ¥6000 per hour on the average, with a standard deviation of ¥1200. In Stuttgart, Germany, stock brokers earn an average of €18 per hour with a standard deviation of €6. In which country is the variation in wages greatest? 130.Find the coefficient of.
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90.Given the contingency table shown here, find the joint probability that a call sampled at random out of this population is local and 2-5 minutes long. A..5000 B..3125 C..4000 D..4625 91.Given the contingency table shown here, if a call is sampled at random, find the marginal probability that the call is long distance. A..3750 B..6250 C..4000 D.300/500 92.If a call.
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11.The triangular distribution T(0,10,20) is skewed left. 12.A triangular distribution can be skewed either left or right. 13.For a continuous random variable, the total area beneath the PDF will be greater than zero but less than one. 14.The exponential distribution is continuous and the Poisson distribution is discrete, yet the.
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117.There is a .02 probability that a customer's Visa charge will be rejected at a certain Target store because the transaction exceeds the customer's credit limit. What is the expected number of Visa transactions until the first one is rejected? A. 10 B. 20 C. 50 D. 98 118.The geometric distribution best describes: A..
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135.The athletic departments at 10 randomly selected U.S. universities were asked by the Equal Employment Opportunity Commission to state what percent of their nursing scholarships were presently held by women. The responses were 5, 4, 2, 1, 1, 2, 10, 5, 5, 5. Find the mean, median, mode, and geometric.
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11.Events A and B are mutually exclusive if P(A∩B) = 0. 12.Independent events are mutually exclusive. 13.If events A and B are mutually exclusive, then P(A) + P(B) = 0. 14.P(A|B) is the joint probability of events A and B divided by the probability of A. 15.Two events A and B are independent if.
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True / False Questions 1.A continuous uniform distribution is always symmetric. 2.The height and width of a continuous uniform distribution's PDF are the same. 3.A continuous uniform distribution U(0,800) will have μ = 400 and σ = 230.94. 4.A continuous uniform distribution U(100,200) will have the same standard deviation as a.
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60.Given the contingency table shown here, find P(A or B). A..25 B..85 C..60 D..42 61.Given the contingency table shown here, find P(B|A). A..250 B..555 C..855 D..625 62.Given the contingency table shown here, what is the probability that a randomly chosen employee who is under age 25 would be absent 2 or more days? A..625 B..375 C..150 D..273 63.Oxnard Casualty wants to ensure that their e-mail.
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50.Given the contingency table shown here, find the probability P(V´), that is, the probability of the complement of V. A..30 B..50 C..80 D..15 51.Given the contingency table shown here, find P(W ∩ S). A..12 B..30 C..40 D..58 52.Given the contingency table shown here, find P(A or M). A..2500 B..7500 C..6250 D..1250 53.Given the contingency table shown here, find P(A2). A..1842 B..1766 C..8163 D..0578 54.Given the contingency table shown here, find.
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115.The following frequency distribution shows the amount earned yesterday by employees of a large Las Vegas casino. Estimate the mean daily earnings. A.$112.50 B.$125.01 C.$105.47 D.$117.13 116.The following table is the frequency distribution of parking fees for a day: The mean parking fee is: A.$7.07. B.$6.95. C.$7.00. D.$7.25. 117.Find the standard deviation of this sample: 4, 7, 9, 12, 15. A.4.550 B.3.798 C.4.278 D.2.997 118.The 25th.
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45.In a sample of 10,000 observations from a normal population, how many would you expect to lie beyond three standard deviations of the mean? A.None of them B.About 27 C.About 100 D.About 127 46.The Excel formula for the standard deviation of a sample array named Data is: A.=STDEV.S(Data). B.=STANDEV(Data). C.=STDEV.P(Data). D.=SUM(Data)/(COUNT(Data)-1). 47.Which is not true of an outlier? A.It is likely.
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47.Which probability model would you use to describe the number of customers served at a certain California Pizza Kitchen until the first customer orders split pea soup? A. Binomial B. Geometric C. Uniform D. Poisson 48.Which distribution has a mean of 5? A. Poisson with λ = 25. B. Binomial with n = 200, π.
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Short Answer Questions 124.Axolotl, Inc. decided to double the number of independent network file servers, each server being capable of running its entire internal corporate network. Bob suggested that "doubling the number of file servers in our corporate network will just double the chances of failure." Is Bob right? Has the.
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105.Find the sample correlation coefficient for the following data. A..8911 B..9132 C..9822 D..9556 106.Heights of male students in a certain statistics class range from Xmin = 61 to Xmax = 79. Applying the Empirical Rule, a reasonable estimate of σ would be: A.2.75. B.3.00. C.3.25. D.3.50. 107.A reporter for the campus paper asked five randomly chosen students how many occupants,.
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50.The price-earnings ratio for firms in a given industry follows the normal distribution. In this industry, a firm whose price-earnings ratio has a standardized value of z = 1.00 is approximately in the highest ______ percent of firms in the industry. A. 16 percent B. 34 percent C. 68 percent D. 75 percent 51.A.
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110.The value of 4P2 is: A.8. B.6. C.24. D.12. 111.The probability that event A occurs, given that event B has occurred, is an example of: A.a marginal probability. B.a conditional probability. C.a joint probability. D.more than one of the above. 112.If each of two independent file servers has a reliability of 93 percent and either alone can run the website,.
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31.When two events A and B are independent, the probability of their intersection can be found by multiplying their probabilities. 32.Two events are mutually exclusive when they contain no outcomes in common. 33.In a contingency table, the probability of the union of two events is found by taking the frequency of the.
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65.Which Excel function is designed to calculate z =(x-μ)/σ for a column of data? A.=STANDARDIZE B.=NORM.DIST C.=STDEV.P D.=AVEDEV 66.Which Excel function would be least useful to calculate the quartiles for a column of data? A.=STANDARDIZE B.=PERCENTILE.EXC C.=QUARTILE.EXC D.=RANK 67.A sample of 50 breakfast customers of MacDonald's showed the spending below. Which statement is least likely to be correct? A.The median is.
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100.Given the contingency table shown here, find P(G | M). A..1800 B..0450 C..3333 D..1350 101.Given the contingency table shown here, find P(V or S). A..3825 B..4300 C..0475 D..4775 102.Given the contingency table shown here, find P(V | S). A..2639 B..1900 C..0475 D..4144 103.The manager of Ardmore Pharmacy knows that 25 percent of the customers entering the store buy prescription drugs, 65 percent buy over-the-counter drugs,.
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107.Use the binomial model to find the approximatehypergeometric probability of at least two damaged flash drives in a sample of five taken from a shipment of 150 that contains 30 damaged flash drives. A. 0.9421 B. 0.0579 C. 0.7373 D. 0.2627 108.On a particular day, 112 of 280 passengers on a particular DTW-LAX flight.
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37.In a randomly chosen week, which probability model would you use to describe the number of accidents at the intersection of two streets? A. Binomial B. Poisson C. Hypergeometric D. Geometric 38.Which model best describes the number of nonworking web URLs ("This page cannot be displayed") you encounter in a randomly chosen minute while.
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85.Which statistics offer robust (resistant to outliers) measures of center? A.Mean, midrange, mode. B.Median, midhinge, trimmed mean. C.Trimmed mean, midrange, midhinge. D.Mean, mode, quartiles. 86.The Empirical Rule says that: A.most business data sets are normally distributed. B.outliers are within three standard deviations of the mean. C.in most business data we expect the mean and median to be similar. D.about.
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Multiple Choice Questions 30.A machine dispenses water into a glass. Assuming that the amount of water dispensed follows a continuous uniform distribution from 10 ounces to 16 ounces, the average amount of water dispensed by the machine is: A. 12 ounces. B. 13 ounces. C. 14 ounces. D. 16 ounces. 31.A machine dispenses water into.
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146.Craig operates a part-time snow-plowing business using a 2002 GMC 2500 HD extended cab short box truck. Describe Craig's gasoline mileage based on this histogram of 195 tanks of gas. 147.Craig operates a part-time snow-plowing business using a 2002 GMC 2500 HD extended cab short box truck. Describe Craig's gasoline mileage.
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11.The Poisson distribution can be skewed either left or right, depending on λ. 12.Although the shape of the Poisson distribution is positively skewed, it becomes more nearly symmetric as its mean becomes larger. 13.As a rule of thumb, the Poisson distribution can be used to approximate a binomial distribution when.
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75.The median of 600, 800, 1000, 1200 is: A.800. B.1000. C.900. D.950. 76.The 25th percentile for waiting time in a doctor's office is 19 minutes. The 75th percentile is 31 minutes. The interquartile range is: A.12 minutes. B.16 minutes. C.22 minutes. D.impossible to determine without knowing n. 77.The 25th percentile for waiting time in a doctor's office is 19 minutes..
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Multiple Choice Questions 40.Events A and B are mutually exclusive when: A.their joint probability is zero. B.they are independent events. C.P(A)P(B) = 0 D.P(A)P(B) = P(A | B) 41.If two events are complementary, then we know that: A.the sum of their probabilities is one. B.the joint probability of the two events is one. C.their intersection has a nonzero probability. D.they.
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80.Given the contingency table shown here, if a randomly chosen student attends a religious school, what is the probability the location is rural? A..142 B..162 C..167 D..333 81.Given the contingency table shown here, if a randomly chosen student attends school in an inner city location, what is the probability that it is a public school? A..189 B..333 C..500 D..567 82.Given.
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148.Here are advertised prices of 21 used Chevy Blazers. Describe the distribution (center, variability, shape). 149.Briefly describe this sample of departure delays on American Airlines flights out of Denver over a seven-day period, March 3-9 (n = 150 flights). 150.Six graduates from Fulsome University's Master's of Waste Management program were hired by.
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95.Twelve randomly chosen students were asked how many times they had missed class during a certain semester, with this result: 3, 2, 1, 2, 1, 5, 9, 1, 2, 3, 3, 10. The median is: A.7.0. B.3.0. C.3.5. D.2.5. 96.One disadvantage of the range is that: A.only extreme values are used in its calculation. B.it is expressed.
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70.Given the contingency table shown here, what is the probability that a mother in the study smoked during pregnancy? A..2591 B..3174 C..5000 D..7401 71.Given the contingency table shown here, what is the probability that a mother smoked during pregnancy if her education level was below high school? A..2385 B..0907 C..3503 D..3804 72.Given the contingency table shown here, what is the.
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