Multiple choice

1. In a systematic sampling study, if the sampling frame has 1,500 names and the desired sample size is 50, the "skip interval" should be:

A. 25. 

B. 0.03. 

C. 50. 

D. 30. 

2. Which of the following statements about sampling error is FALSE?

A. As we add more subjects to a sample to increase sample size, sampling error also goes up. 

B. Sampling error could happen because of a mistake in drawing a sample. 

C. Sampling error can occur because of miscalculation of the sample size. 

D. Sampling error can be determined only after a sample has been drawn. 

3. Which one of the following is a non probability sample method?

A. Simple random sampling 

B. Cluster sampling 

C. Snowball sampling 

D. Area sampling 

4. A college professor wants to find if students in the U.S. colleges will find the new textbook that he has written to be useful and interesting. He decides to sample all marketing majors at the school he teaches. He believes that this group of students will be representative of the U.S. college student population. His method of sampling is most probably __________ sampling.

A. census 

B. convenience 

C. judgment 

D. quota