In a clinical trial, 30 sickle cell anemia patients are randomly assigned to two groups. One group receives the currently mar- keted medicine, and the other group receives an experimental medicine. Each week, patients report to the clinic where blood tests are conducted. The lab technician is unaware of the kind of medicine the patient is taking. This design can be described as
A.
a completely randomized design, with the currently marketed medicine and the experimental medicine as two treatments
B.
a matched-pairs design, with the currently marketed medicine and the experimental medicine forming a pair
C.
a randomized block design, with the currently marketed medicine and the experimental medicine as two blocks
D.
a randomized block design, with the currently marketed medicine and the experimental medicine as two treatments
E.
a stratified design with two strata, patients with sickle cell disease forming one stratum and those without sickle cell disease forming the other stratum
Exam No：AP Statistics Problem Set 11 Year：2024 Question No：APStatistics2024AP0459
Answer:
A
Knowledge points:
3.5 Introduction to Experimental Design
3.6 Selecting an Experimental Design
3.7 Inference and Experiments
Solution:
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