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A nutritionist wants to conduct a study to determine the efficacy of eating beans as an aid in weight loss. She randomly assigns half of a group of overweight people to a treatment group who are given a planned diet which includes a variety of beans at two meals each day for six weeks. The other half of the group is given the same diet without the beans. Both diets are designed to have the same caloric content. A nurse at the nutrition center weighs each subject on Friday of each week. Select the potential source of confounding (if any). A) Experimenter effect B) Placebo effect C) Method of assignment to treatment and control groups D) The study is essentially free of confounding sources.

A nutritionist wants to conduct a study to determine the efficacy of eating beans as an aid in weight loss. She randomly assigns half of a group of overweight people to a treatment group who are given a planned diet which includes a variety of beans at two meals each day for six weeks. The other half of the group is given the same diet without the beans. Both diets are designed to have the same caloric content. A nurse at the nutrition center weighs each subject on Friday of each week. Select the potential source of confounding (if any). A) Experimenter effect B) Placebo effect C) Method of assignment to treatment and control groups D) The study is essentially free of confounding sources.

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.6: Summarizing Categorical Data
Problem 27PPS
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A nutritionist wants to conduct a study to determine the efficacy of eating beans as an aid in weight
loss. She randomly assigns half of a group of overweight people to a treatment group who are given a planned diet which includes a variety of beans at two meals each day for six weeks. The other half of the group is given the same diet without the beans. Both diets are designed to have the same caloric content. A nurse at the nutrition center weighs each subject on Friday of each week. Select the potential source of confounding (if any).
A) Experimenter effect
B) Placebo effect
C) Method of assignment to treatment and control groups
D) The study is essentially free of confounding sources. 

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