Which of the following best describes a research design?

• 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.

How many tests do homogeneous experimental units be subjected to the

same treatment under similar conditions?

• at least one replicate

• minimum of two replicates

• minimum of three replicates

• multiple times

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?

• skin cancer

• samples A and B

• exposure to ultraviolet rays

• 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?

• control group

• experimental units

• dependent variable

• independent variable

Justin B. believes that the temperature lowering during the fall months is what

causes the color of the leaves to change. He set up an experiment wherein he

placed some plants in 80 degrees rooms and some in 60-degree rooms. He then

observed the color of the leaves for a total of 1 month. At the end of the month,

Justin observed that ¾ of the plants in the 60-degree temperature had been to

change colors and only ¼ of the plants in the 80-degree temperature began to

change colors. What is the dependent variable in the problem?

• the changing colors of the leaves

• temperature lowering during the fall months

• ¾ of the plants placed in the 60-degrees temperature

• ¼ of the plants placed in the 80-degrees temperature

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

What type of experiment design is used in the given situation?

• complete block design

• completely randomized design

• randomized complete block design

• both CBD and CRD

Which are the experimental units?

• 10 lettuce plants without fertilizer

• 10 lettuce plants with organic fertilizer

• 20 lettuce plants used in the experiment

• 40 lettuce plants used in the experiment

What is the purpose of keeping the same amount of water and sunlight for all lettuce plants?

• serve as extraneous variables

• to focus on the experimental treatment

• to know other variables that may contribute to the growth of the lettuce

  plants

• both serve as extraneous variables and to focus on the experimental treatment

What is the primary purpose of having a group of 10 lettuce plants treated with commercial fertilizer?

• control

• extraneous

• experimental

• study subject