**In stratified sampling the strata should be _________?**

**A. Nonoverlapped **

B. Overlapped

C. Same

D. Not equal

**A. Nonoverlapped **

B. Overlapped

C. Same

D. Not equal

A. Individuals

B. Whole**C. Universe**

D. None of these

A. Sampling**B. Allocation**

C. Estimate

D. Population

A. Census

B. Complete enumeration

C. Survey**D. Both A & B**

A. Survey

B. Sampling**C. Census**

D. None of these

A. Cluster sampling**B. Stratified sampling **

C. Simple random sampling

D. None of these

A. Close another**B. Far a part**

C. Mixed

D. None of these

A. Normal because is always approximately normally distributed

B. Normal because the sample size is small in comparison to the population size**C. Normal because of the central limit theorem**

D. None of these alternatives is correct.

**A. Standard error of statistics**

B. Sampling error of statistics

C. Sampling distribution of statistics

D. None of these

A. Probabilistic sampling

B. Stratified sampling**C. No probabilistic sampling**

D. Cluster sampling