Dr Q Is Conducting an Experiment to Determine If Vitamin

question 15

Multiple Choice

Dr Q is conducting an experiment to determine if vitamin Z can reduce blood pressure in a group of middle-aged adults.Dr Q asks a collegue,who is not involved in the study,to use a computer programme that assigns the students to one or two groups,purely on the basis of chance.One group receives a capsule of vitamin Z and the other group receives a vitamin-free pill that tastes and looks identical to the vitamin Z capsule.Neither Dr Q nor the participants know who is receiving the vitamin and who is receiving the vitamin-free pill.Which statement best describes the experiment?

• A)This is a double-blind intervention trial that is randomized,has a treatment group that is receiving a placebo and is designed to show a causal relationship between vitamin Z and blood pressure
• B)This is a double-blind intervention trial that is randomized,has a control group that is receiving a placebo and is designed to show a causal relationship between vitamin Z and blood pressure.
• C)This is an observational study that is randomized,has a control group that is receiving a placebo and is designed to show a causal relationship between vitamin Z and blood pressure.
• D)This is an intervention trial that includes a control group that is receiving a placebo and a treatment group receiving Vitamin Z,but participants were not randomly assigned to the control or the treatment group.

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