2. \"In this study the experimental treatment is (Chia Seeds, Placebo, 12 weeks,

Question

2. "In this study the experimental treatment is (Chia Seeds, Placebo, 12 weeks, 38 Men, 38 Women) and the control treatment is (Chia Seeds, Placebo, 12 weeks, 38 Men, 38 Women)."

3. "Blocking (Has, Has Not) been used in this study. The blocking variable is (Chia Seeds, Gender, Volanteer Status, Diet Supplement)."

5. "The study (Can, Cannnot) be used to establish a causal relationship because the study is an (experiment, oberservational study). If the men and the women in the sample are a representative sample, the conclusions (Can, Cannot) be generalized to the entire population. "

(9 points) Chia Pets -- those terra-cotta figurines that sprout fuzzy green hair -- made the chia plant a household name. But chia has gained an entirely new reputation as a diet supplement. In one 2009 study, a team of researchers recruited 38 men and divided them evenly into two groups: treatment or control. They also recruited 38 women, and they randomly placed half of these participants into the treatment group and the other half into the control group. One group was given 25 grams of chia seeds twice a day, and the other was given a placebo. The subjects volunteered to be a part of the study. After 12 weeks, the scientists found no significant difference between the groups in appetite or weight loss. 1. What type of study is this OA. Observational Study OB. Experiment and the control treatment is ? 2. In this study the experimental treatment is? 3. Blocking? 4. Has blinding been used in this study? been used in this study. The blocking variable is? A. The study is blinded because the subjects do not know if they received the chia seeds or the placebo. B. The study is not blinded because the researchers know if participants consumed the chia seeds or placebo C. The study is not blinded because the subjects do not know if they received the chia seeds or the placebo. D. The study is blinded because the researchers do not know if participants consumed the chia seeds or placebo. E. None of the above 5. The study be used to establish a causal relationship because the study is an sample, the conclusions? . If the men and the women in the sample are a representative be generalized to the entire population.

Explanation / Answer

1. The given study is an experiment.

(Since, here, the investigator assigns the treatments to experimental units and then observes its effect.)

2. In this study the experimental treatment is Chia Seeds and the control treatment is Placebo.

(Since experimental treatment is the treatment that is to be tested and control treatment is the one against which the former is tested.)

3. Blocking Has been used in this study. The blocking variable is Gender.

(Since, the investigator would need no variation due to gender, while studying the variability due to chia seeds, as the former would act as a nuisance in his study, interfering with the latter.Hence he uses Gender as the blocking factor for his subjects)

4. Blinding has been used in this study.

A. The study is blinded because the subjects do not know if they received the chia seeds or the placebo.

5. The study Can be used to establish a causal relationship because the study is an experiment. If the men and the women in the sample are a representative sample, the conclusions Can be generalized to the entire population.

( Since, in an experimental study, the investigator himself assigns the treatments to the participants,ensuring that they differ only in the treatments assigned.Since no other factor interferes with it, it would help establish a causal relationship.)

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