爱考云 - 搜题找答案神器_海量试题解析在线查

题目 Which is most likely to characterize the frequency of operational losses? 选项 A.Bernoulli B.Binomial C.Poisson D.All of the above 答案 C 解析 Poisson泊松分布 [...]

题目 Which statement best describes correlations and variances in times of financial crisis? 选项 A.There are only marginal changes in correlations and variances in times of crisis and therefore [...]

题目 When will we use a t-test instead of using z-test: 选项 A.The sample size is small. B.The sample size is big. C.The variance of the population is known. D.The standard deviation is larger [...]

题目 A distribution of returns that has a greater percentage of small deviations from the mean and a greater percentage of extremely large deviations from the mean: 选项 A.is positively skewed. [...]

题目 The joint probability distribution of random variables X and Y is given by f(x,y) = k× x×y for x =1,2,3,y =1,2,3, and k is a positive constant. What is the probability that X+Y will exceed [...]

题目 An analyst is concerned with the symmetry and peakedness of a distribution of returns over a period of time for a company she is examining. She does some calculations and finds that the median [...]

题目 X and Y are discrete random variables with the following joint distribution; Pr (X = 4,Y = 30) = 0.07.「huixue_img/importSubject/1564169386363850752.png」What is the conditional standard [...]

题目 Which of the following statements is the most accurate about the relationship between a normal distribution and a Student's t-distribution that have the same mean and standard deviation? [...]

题目 An analyst observes that the closing prices of a stock during a week are $33, $43, $45, $48, $46. On the corresponding days the S&P 500 closed at 1150, 1125, 1140, 1160, and 1170. Based on [...]

题目 The annual marginal probability of default of a bond is 15% in year 1 and 20% in year 2. What is the probability of the bond surviving (i.e. no default) to the end of two years? 选项 A.68% [...]