Statistics Mcqs Practice Test

Question 1

In binomial experiment successive trials are ______________?

Accepted Answer

B. Independent

Question 2

In binomial experiment, the successive trials are _____________?

Accepted Answer

B. independent

Question 3

In the binomial experiment, the outcomes of each trial maybe classified into ______________?

Accepted Answer

C. Success or Failure

Question 4

A binomial random variable can assume values from _________ to n?

Accepted Answer

D. 0

Question 5

In binomial distribution the probability of success remains __________ from trial to trial?

Accepted Answer

A. Constant

Question 6

Let X1,X2,……,Xn be a random sample from a density,,,, f(x ι θ) where θ is a value of the random variable Θwith known density gΘ(θ) Then the estimator ∏(θ) with…/ respect to the prior gΘ(θ) is define as______________E[∏(θ)ιX1,X2,…..,Xn] is called?

Accepted Answer

A. Posterior Bay’s estimator

Question 7

The non parametric equivalent of an unpaired samples t-test____________?

Accepted Answer

B. Mann-Whitney U test

Question 8

When testing for randomness, we can use_____________?

Accepted Answer

C. Runs test

Question 9

Which of the following test is most likely assessing this null hypothesis: Ho The number of violations per apartment in the population of all city apartments is binomially distributed with a probability of success in any one trial of P=0.3 dd ?

Accepted Answer

D. The Kolmogorove-Simirnor test

Question 10

Which of the following test must be two-sided ?

Accepted Answer

A. Sign test

Question 11

The Wilcoxon, Rank-Sum test used to compares_______________?

Accepted Answer

C. Two populations

Question 12

Comparing the times to failure of radar transponders made by firms A, B, and C based on an airline’s sample experience with the three types of instruments one may use____________?

Accepted Answer

D. Kruskal-Wallis test

Question 13

In testing for the difference between two populations, it is possible to use____________?

Accepted Answer

D. Either of the above

Question 14

The Runs test results in rejecting the null hypothesis of randomness when______________?

Accepted Answer

D. Either of the above

Question 15

The critical value of a test statistic is determined from_____________?

Accepted Answer

C. The sampling distribution of the statistic assuming Alternative Hypothesis.

Question 16

what is the probability of a type II error when α=0.05 ?

Accepted Answer

D. Cannot be determined without more information

Question 17

condition for applying Central Limit Theorem (CLT) which approximate the sampling distribution of the mean with a normal distribution is ?

Accepted Answer

A. n > 30

Question 18

For t distribution, increasing the sample size, the affect will be on ?

Accepted Answer

D. All Above

Question 19

A quantity obtained by applying certain rule or formula is known as ________________?

Accepted Answer

A. Estimate

Question 20

Analysis of Variance (ANOVA) is a test for equally of______________?

Accepted Answer

A. Variances