Statistics Mcqs Practice Test

Question 1

Which of the following is an assumption underlying the use of the t-distribution ?

Accepted Answer

A. The sample are drawn from a normally distributed population.

Question 2

Herbicide A has been used for years in order to kill a particular type of weed. An experiment is to be conducted in order to see whether a new herbicide, Herbicide B, is more effective than Herbicide A. Herbicide A will continue to be used unless there is sufficient evidence that Herbicide B is more effective. The alternative hypothesis in this problem is_____________?

Accepted Answer

D. Herbicide B is not more effective than Herbicide A

Question 3

Consistency of an estimator can be checked by comparing____________?

Accepted Answer

D. Variance

Question 4

Criteria to check a point estimator to be good are_____________?

Accepted Answer

B. All Above

Question 5

The first and starting point in test Hypothesis is ______________?

Accepted Answer

B. stating Ho

Question 6

If Ho is stated as Q = Qo< the alternate hypothesis in general stated________________?

Accepted Answer

C. Q ≠ Qo

Question 7

Which of the following cannot be Ho_________________?

Accepted Answer

D. Q ≠ Qo

Question 8

Type II error is committed when the null hypothesis is _________________?

Accepted Answer

D. Accepted when it is false

Question 9

The hypothesis which is being tested is called ___________________?

Accepted Answer

C. Null hypothesis

Question 10

95% confidence limits for P are _________________?

Accepted Answer

D. P±1.96√p2q2/n

Question 11

The Estimation and testing of hypothesis are main branches of ________________?

Accepted Answer

D. Statistical Inference

Question 12

___________ is a value of sample statistics?

Accepted Answer

A. Estimate

Question 13

Sampling Error decrease by _______ the sample size?

Accepted Answer

D. Population

Question 14

Since E(X) _______X is said to be unbiased estimator of the population mean?

Accepted Answer

D. u

Question 15

A_______ is the specific value of the statistic used to estimate the population parameter?

Accepted Answer

A. Point estimator

Question 16

A sample of 92 observations is taken from an infinite population. The sampling distribution of is approximately ?

Accepted Answer

C. Normal because of the central limit theorem

Question 17

The standard deviation of sampling distribution of a statistics is _________________?

Accepted Answer

A. Standard error of statistics

Question 18

For a population with any distribution, the form of the sampling distribution of the sample mean is_____________?

Accepted Answer

D. Always normal for large sample sizes

Question 19

Convenience sampling is an example of______________?

Accepted Answer

C. No probabilistic sampling

Question 20

The process of dividing a heterogeneous_____________?

Accepted Answer

B. Stratification