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Chapter 12: Q. AP4.35 (page 833)

AP4.35 In a clinical trial, 30 patients with a certain blood disease are randomly assigned to two groups. One group is then randomly assigned the currently marketed medicine, and the other group receives the experimental medicine. Every week, patients report to the clinic where blood tests are conducted. The clinic technician is unaware of the kind of
medicine each patient is taking, and the patient is also unaware of which medicine he or she has been given. This design can be described as
a. a double-blind, completely randomized experiment, with the currently marketed medicine and the experimental medicine as the two treatments.
b. a single-blind, completely randomized experiment, with the currently marketed medicine and the experimental medicine as the two treatments.
c. a double-blind, matched pairs design, with the currently marketed medicine and the experimental medicine forming a pair.
d. a double-blind, block design that is not a matched pairs design, with the currently marketed medicine and the experimental medicine as the two blocks.
e. a double-blind, randomized observational study.

Short Answer

Expert verified

The correct answer is option (a) a double-blind, completely randomized experiment, with the currently marketed medicine and the experimental medicine as the two treatments.

Step by step solution

01

Given information

To determine the design can be described from the given options.

02

Explanation

Patients with a certain blood illness are randomly assigned to one of two groups in a research trial.
In a double blind experiment, neither the subjects nor the people who measure them know which treatment they had, whereas in a single blind experiment, either the people who measure or the people who get the results know which treatment they got.
Patients were assigned to groups at random, and an experiment purposefully imposed some therapy on individuals in order to evaluate their responses, such that a completely randomized experiment using treatments from two categories of medicine.
As a result, the proper choice is option (a) a double-blind, completely randomized experiment, with the currently marketed medicine and the experimental medicine as the two treatments.

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