Research Design

Which of the following best describes a research design?

• a. It serves as a framework for the literature review and answering the research questions

• It is the overall strategy that you choose to integrate while planning the research proposal

• It makes the conclusion valid because it takes into consideration all the assumptions that went into deriving the various inferences

• It ensures that appropriate data will be obtained that permits an objective analysis, leading to valid inferences about the stated problem.

Anna thinks that if people are exposed to ultraviolet light then they are more likely to get skin cancer. She designs an experiment wherein sample A consisted of people who were exposed to ultraviolet light and sample B was not. Which is the independent variable in the problem?

• a. skin cancer

• b. samples A and B

• c. exposure to ultraviolet rays

• d. people who are exposed to ultraviolet light

. A researcher plants three plots of flower seeds. He weeds and waters the first plot every day. He weeds and waters the second plot every other day. He leaves the third plot alone. After 12 weeks, the researcher measures the height of each flower. What is the role of the plots of flowers in the experiment?

• a. control group

• b. experimental units

• c. dependent variable

• d. independent variables

The boss in a company wants to experiment if workers will complete the 2 months of stress management training will lessen their number of sick days in a year. How should the control group in this experiment be treated?

• . no participation in the stress training program

• complete the stress training program for 2 months

• participate in different training programs in 2 months

• participate in the stress training program at different number of days

: A farmer wants to study whether organic fertilizer will increase the growth of the lettuce plants at a fast rate. He used 20 lettuce plants for this experiment. He randomly chose 10 lettuce samples treated with organic fertilizer while the remaining 10 samples are to be treated with commercial fertilizer. The amount of water and sunlight are kept the same for all the sample plants. What type of experiment design is used in the given situation?

• complete block design

• completely randomized design

• randomized complete block design

• both b and c