what is one benefit of using a large sample size in an experiment
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Nutrition Final Exam

1. What is one benefit of using a large sample size in an experiment?

Correct answer: A

Rationale: Corrected Rationale: Using a large sample size reduces the likelihood of chance variation affecting the results, providing more reliable data. Choice B is incorrect because the placebo effect is related to participants' beliefs, not sample size. Choice C is incorrect as double-blind refers to a method of reducing bias, not directly related to sample size. Choice D is incorrect because the similarity between the control and experimental groups is not solely dependent on sample size.

2. What is the recommended daily intake of fiber for adults?

Correct answer: D

Rationale: The recommended daily intake of fiber for adults is 25 grams. Fiber plays a crucial role in maintaining digestive health, preventing constipation, and aiding in weight management. Options A (10 grams), B (15 grams), and C (20 grams) are incorrect as they are below the recommended daily intake of fiber for adults, which is 25 grams.

3. If a group of people consumes an amount of protein equal to the estimated average requirement for their population group, what percentage of people will receive insufficient amounts?

Correct answer: D

Rationale: If a group consumes an amount of protein equal to the estimated average requirement, 50% of the people will receive insufficient amounts. The estimated average requirement is the amount of a nutrient that is estimated to meet the requirement of half the healthy individuals in a particular life stage and gender group. Therefore, 50% of the group will not be meeting their individual needs if they are consuming only the average requirement. Choices A, B, and C are incorrect because at the estimated average requirement level, a higher percentage than those values will receive insufficient amounts.

4. How is gastroesophageal reflux (GER) typically treated in infants?

Correct answer: B

Rationale: Thickening the formula or breast milk with cereal is a common treatment for gastroesophageal reflux (GER) in infants. By adding cereal, the feedings become heavier, making it less likely for the stomach contents to reflux. Keeping the infant NPO (nothing by mouth) is not typically necessary for GER treatment and might not be appropriate. Placing the infant to sleep on the side is not recommended due to the risk of sudden infant death syndrome (SIDS). Switching the infant to cow's milk is also not a recommended treatment for GER as it can exacerbate symptoms due to its protein content.

5. How should a caregiver handle a child with a known peanut allergy?

Correct answer: A

Rationale: Educating on allergen avoidance is the correct approach when dealing with a child who has a known peanut allergy. This helps in managing the allergy effectively and preventing potential allergic reactions. Increasing exposure to peanuts (Choice B) is dangerous and can trigger severe allergic reactions in a child with a peanut allergy. While antihistamines (Choice C) can help alleviate some symptoms, they should not be the primary method of managing a peanut allergy. Suggesting occasional consumption of peanuts (Choice D) is extremely risky and should never be done for a child with a known peanut allergy.

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