A researcher conducted a randomized control trial to study the effect of a new d

Question

A researcher conducted a randomized control trial to study the effect of a new drug for hypertension. The researcher recruited some patients suffering from hypertension in his study and randomly assigned them into either the new-drug group or the placebo group. At the end of the study, the researcher compared the mean blood pressure of the two groups. The investigated data of this study are recorded in the table. General Information [2 points Blood Pressure 70 79 69 95 91 85 89 75 78 81 90 95 67 What is the sample size? New Drug What is the study design? 89 92 97 82 79 85 Placebo What is the importance of the placebo group? How many patients were recruited in the new-drug group?

Explanation / Answer

(a) Sample size is 20

(EXPLANATION: The researcher recruited 20 patients suffering from hypertension in his study)

(b) The study design is designed as formulation of experiment for conducting the study, which allows the researcher to translate the conceptual hypothesis into an operational one.

Here, The study design is assigning the selected patients into two groups: the new-drug group and the placebo group and comparing their mean blood pressure.

(c) The placebo group is important in the aspect that it provides a forum with which mean blood pressure of new-drug group be compared and conclusion about the effectiveness of the new drug can be arrived at.

(d) 11 patients were recruited in the new-drug group.

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