Question

Eleanor Rigby the Sock-Eating Mutt wants to know whether topical or oral flea preventative measures are more effective for treating fleas in dogs. From a list of 9520 dogs, she finds 60 that are suitable for her study. She divides the 60 dogs within her study into three groups: small dogs (< 20 lbs), medium dogs (20 to 60 lbs), and large dogs (> 60 lbs). There are 20 dogs in each group. She randomly assigns 10 dogs from each size group to receive an appropriate dosage of the topical flea preventative, and the other 10 to receive the oral flea preventative.

Which of the following best describes the design of her study?

Select one:

a. Stratified design 0

b. Randomized block design 0

c. Cluster design 0

d. Simple random design 0

e. Completely randomized design 0

Answer 1

From the given information,

As the data divided into 3 blocks,

Hence, Required answer is,

Randomized block design.

i.e., Option b. is correct.

Thank you.