STA301 Quiz 4 by HB

Q1. The standard deviation of sampling distribution of proportion is:

1. n/p
2. p
3. q/n
4. √(pq/n)

Q2. As a rule of thumb, when n>=30, then we can assume that………is normally distributed:

1. Sampling distribution of sample mean
2. Probability distribution
3. Binomial distribution
4. Sampling distribution

Q3. Which of the following is most important and most widely used method in point estimation?

1. The method of fractional moments
2. The method of maximum likelihood
3. The method of least square
4. The method of moments

Q4. In sampling from a large population with б = 35, the standard error of the mean is found to be 4. The size of the sample used is:

1. 77
2. 15
3. 56
4. 25

Q5. As the sample size _____________ the variation of the sampling distribution of the same means

1. Decreases, decreases
2. Decreases, remains the same
3. Increases, decreases
4. Increases, remains the same

Q6. Method of Moments for estimation of parameters is based on the theory of

1. None of the above
2. Non-linear estimation
3. Both Linear and Non-linear
4. Linear Estimation

Q7. A confidence interval has a specified probability__________ of containing the true value of the parameter.

1. 1-α
2. 1+α
3. α/2
4. α

8. The mean of the sampling distribution of x¯¯¯1−x¯¯¯2, denoted by μx¯¯¯1−x¯¯¯2is equal to the difference between repectiveThe mean of

repective

9.

a. Sample Proportions · b. Population Proportions · c. Population Means · d. Sample Means

10.

If Var(T1) >Var(T2) ,where T1 and T2 are two unbiased estimators ,then:

a. T2 is more efficient · b. T1 is more consistent · c. T2 is more consistent · d. T1 is more efficient

11.

If our sampled population is normal, then sampling distribution of the sample mean will

a. None of the above · b. Normal · c. Depends on sample size · d. Not necessarily normal

12. When sample size is to be considered large, population standard deviation can be replaced by

a. Sample Mean · b. Sample Variance · c. Sample Standard Deviation · d. Population variance

13.