Statistical Inference Mcqs - Set 5

1)   Let Z1,Z2,….Zn be independent and identically distributedrandom variable, satisfying E[ι Zt ι]<∞. Let N be an integer valued random variable whose value n depends only on the values of the first n Z¡'s. Suppose E(N)< ∞, then E(Z1,Z2,….Zn)=E(N)E(Z) is called ?

a. Independence Equation
b. Sequential Probability Likelihood Equation
c. Neyman Pearson Lemma
d. Wald’s Equation
Answer  Explanation 

ANSWER: Independence Equation

Explanation:
No explanation is available for this question!


2)   Let X1,X2,…Xn be a random sample from the density f(x;(θ), where θ may be vector. If the conditional distribution of X1,X2,…Xn given S=s does not depend on θ for any value of s of S, then statistic is called?

a. Minimal sufficient statistic
b. Sufficient statistic
c. Efficient
d. Minimax statistics
Answer  Explanation 

ANSWER: Minimal sufficient statistic

Explanation:
No explanation is available for this question!


3)   if Var(θˆ)→0 as n → 0, then θˆ is said to be______________?

a. Sufficient
b. Efficient
c. Unbiased
d. Consistent
Answer  Explanation 

ANSWER: Consistent

Explanation:
No explanation is available for this question!


4)   if f(x1,x2,…xn;θ)=g(θˆ;θ)h(x1,x2,….,xn), then θˆ is____________?

a. Consistent
b. Sufficient
c. Efficient
d. Unbiased
Answer  Explanation 

ANSWER: Sufficient

Explanation:
No explanation is available for this question!


5)   Which of the following test use Rank Sums____________?

a. Kruskal-Wallis and Wilcoxon tests
b. Runs test
c. Chi-Square and sign test
d. F test
Answer  Explanation 

ANSWER: Kruskal-Wallis and Wilcoxon tests

Explanation:
No explanation is available for this question!


6)   Wilcoxon Rank-Sum test can be of_______________?

a. Lower tailed
b. Upper tailed
c. Either of the above
d. None of the above
Answer  Explanation 

ANSWER: Either of the above

Explanation:
No explanation is available for this question!


7)   When using the sign test, if two scores are tied, then_____________?

a. We count them
b. We discard them
c. We depends upon the scores
d. non of these
Answer  Explanation 

ANSWER: We discard them

Explanation:
No explanation is available for this question!


8)   In a Wilcoxon Rank-Sum test__________________?

a. Ties within one sample may affect the decision
b. Ties always affect the decision
c. Ties never affect the decision
d. Ties between the two sample may affect the decision
Answer  Explanation 

ANSWER: Ties within one sample may affect the decision

Explanation:
No explanation is available for this question!


9)   The Spearman Rank-Correlation test requires that the______________?

a. Data must be measured on the same scale
b. Data should be of ordinal scale at least
c. Data must be distribution at least approximately as a t-distribution
d. Data must be from two independent samples
Answer  Explanation 

ANSWER: Data should be of ordinal scale at least

Explanation:
No explanation is available for this question!


10)   To perform a Runs test for randomness the data must be_______________?

a. Divided into at least two classifications
b. Divided into exactly two classifications
c. Quantitative
d. Qualitative
Answer  Explanation 

ANSWER: Divided into exactly two classifications

Explanation:
No explanation is available for this question!