爱考云 - 搜题找答案神器_海量试题解析在线查

题目 X is a discrete random variable with possible outcomes X = {1,2,3,4}. Three functions f(x), g(x), and h(x) are proposed to describe the probabilities of the outcomes in [...]

题目 An estimator with an expected value equal to the parameter that it is intended to estimate is described as: 选项 A.efficient. B.unbiased. C.consistent. 答案 B 解析 ： B is correct. An [...]

题目 Which of the following statements regarding a one-tailed hypothesis test is correct? 选项 A.The rejection region increases in size as the level of significance becomes smaller. B.A [...]

题目 A client holding a ￡2,000,000 portfolio wants to withdraw ￡90,000 in one year without invading the principal. According to Roy’s safety-first criterion, which of the following portfolio [...]

题目 An increase in sample size is most likely to result in a: 选项 A.wider confidence interval. B.decrease in the standard error of the sample mean. C.lower likelihood of sampling from more than [...]

题目 A portfolio has an expected return of 7% with a standard deviation of 13%. For an investor with a minimum annual return target of 4%, the probability that the portfolio return will fail to [...]

题目 An analyst is investigating the relationship between the annual growth in consumer spending (CONS) in a country and the annual growth in the country’s GDP (GGDP). The analyst estimates the [...]

题目 The level of significance of a hypothesis test is best used to: 选项 A.calculate the test statistic. B.define the test’s rejection points. C.specify the probability of a Type II error. [...]

题目 In a discrete uniform distribution with 20 potential outcomes of integers 1 to 20, the probability that X is greater than or equal to 3 but less than 6, P(3 ≤ X ＜ 6), is: 选项 A.0.10. [...]

题目 Which of the following is characteristic of the normal distribution? 选项 A.Asymmetry B.Kurtosis of 3 C.Definitive limits or boundaries 答案 B 解析 ： B is correct. The normal [...]