Question

0201 7) A nutritionist wants to conduct a study to validate the efficacy of an herb as an aid in weight loss She randomly assigns half of a group of overweight persons to a treatment group who are giver the herb with instructions as to use and a planned diet for six weeks. The other half of the group i given the same diet without the herb. Participants are aware as to which group they belong. A nurse at the nutrition center weighs each subject on Friday of each week. Identify any problems that are likely to cause confounding A) Method of assignment to treatment and control groups B) The study is essentially free of confounding sources. C) The placebo effect D) Experimenter effect 2 0 9 y the type of study most appropriate to the question. 8) Which is the best fertilizer for Mr. Jimenez' backyard grass? A) Experimental blinded C) Retrospective observational 2 8 B) Experimental D) Observational 6) A nutritionist wants to conduct a study to validate the efficacy of an herb as an aid in weight loss. She randomly assigns half of a group of overweight persons to a treatment group who are given the herb with instructions as to use and a planned diet for six weeks. The other half of the group is given a placebo with the same instructions and same diet. None of the participants know to which group they belong. The nutritionist weighs each subject on Friday of each week. Identify any problems that are likely to cause confounding A) The study is essentially free of potential confounding. B) Placebo effect C) Method of assignment to treatment and control groups D) Experimenter effect

Answer 1

6)

Correct option:

(B) The study is essentially free of confounding sources

Explanation:

"She randomly assigns" indicates the confounding of Method of assignment to treatment and control groups is taken care of.

The presence of control group of diet without the herb indicates that the placebo effect is taken care of.

Since "A nurse at the nutrition center weighs each subject" indicates that experimenter effect is taken care of.