A pharmaceutical company wants to test the effectiveness of a new allergy drug.

Question

A pharmaceutical company wants to test the effectiveness of a new allergy drug. The company identifies 250 females 30-35 years old who suffer from severe allergies. The subjects are randomly assigned into two groups. One group is given the new allergy drug and the other is given a placebo that looks exactly like the new allergy drug. After six months, the subjects' symptoms are studied and compared. Answer parts (a) through (c) below.(a)Identify the experimental units and treatments used in this experiment. Choose the correct answer below. A.The experimental units are the 30- to 35-year-old females being given the treatment. The treatment is six months. B.The experimental unit is the new allergy drug. The treatments are the severe allergies the patients suffer from. C.The experimental units are the 30- to 35-year-old females being given the treatment. The treatment is the new allergy drug. D.The experimental units are the symptoms from the drug. The treatment is the new allergy drug. (b)Identify a potental problem with the experiment design being used and suggest a way to improve it. Choose the correct answer below. A.There are no biases present. B.There may be a bias on the part of the researcher if the researcher knows which patients were given the real drug. C.There may be a bias on the part of the patients since they do not know if they were given the placebo or the real drug. D.There may be a bias on part of the experiment since only females are being tested. (c)How could this experiment be designed to be a double-blind? Choose the correct answer below. A. The study would be a double-blind study if both the researcher and the patient dit know which patient received the real drug or the placebo. B. The study would be a double-blind study if both te researcher and the patient knew if they received the real drug or the placebo. C. The study would be a double-blind study ifthe patient knew if they received the real drug or the placebo but the researcher did not. D. The

Explanation / Answer

(a)

Here the effect of the new allergy drug is tested on 30-35 years old females.

The experimental units are 30-35 years old females, on whom the test is performed.

The treatment is the new allergy drug, whose effect is to be tested.

Option C is correct.

(b)

If any of the researcher or patient knows which of the patients were given drug or placebo a bias may arise.

Here option B is more appropriate.

(c)

The study would be double blibd if none of the researcher and patient knows which of the patients were given drug or placebo.

Option A is more appropriate.

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