Which is the best fertilizer for Mr. Jimenez’ backyard grass? Select the type of study most appropriate to the question.

Question

A. Experimental
B. Experimental blinded
C. Case-controlled observational
D. Observational
Answer: B

Answer 1

Agree. The blind condition will reduce probability of Jimenez treating them different.

Answer 2

thanks

Answer 3

A. Observation was marked wrong and experimental blinded was wrong the only other option is A. experimental