無年度 - 主題課程_商學院統計：抽樣分配#107842

8.A population is composed of 5 numbers: 2, 4, 6, 8, 10. Let μ and σ denote mean and standard deviation of the population, and denote mean and standard deviation of the sample mnean from the population. Which of the following statement is the most correct one? 

(A)μ=6,σ=3.16;(B).=6,=3.16；(C).=6,=283；(D).μ=6,σ=2.83；(E)=μ,σ = 3.16.

9.If we calculate sample mean from the population in question 8, with sample size equal to 2. Let
and denote the theoretical density and cumulative distributions of the sanple
mean, respectively. Which of the following statement is the most correct one? 

(A)(B)(C)
(D)(E)

10.If we calculate a sample mean from the population in question 8, with sample sive equal to 2. Let and , denote mean and standard deviation of the sample mean. Which of the following statement is the most correct one? (A)(B)(C) (D) = 5.5, = 1.89; (E)