One of the main purposes of conducting a review of the literature before carrying out a

research project is to

A. determine existing knowledge on the topic.

B. help select an optimum sample size.

C. discover an instrument for data collection

that has been used many times.

D. prevent duplication of research.


. Which of the following is true concerning


A. Assumptions are beliefs that have been

found to be true.

B. Researchers’ false beliefs are often called


C. Expectations for study results are presented in the form of assumptions.

D. All studies are based on assumptions