Nursing Elites

1. Why is randomization important in a scientific experiment?

• A. To minimize the impact of confounding variables.
• B. To eliminate bias in the assignment of subjects to groups.
• C. To contribute to the accuracy and validity of the experiment's results.
• D. To prevent systematic differences between groups.

Correct answer: B

Rationale: Randomization is crucial in a scientific experiment to eliminate bias in the assignment of subjects to groups. By randomly assigning subjects, it helps ensure that any differences observed in the outcomes are due to the experimental treatment and not to preexisting differences between groups. Choice A is incorrect because randomization does not guarantee representativeness but rather minimizes the impact of confounding variables. Choice C is not entirely accurate; while randomization can contribute to accuracy and validity, its primary purpose is to reduce bias. Choice D is incorrect as the goal of randomization is not to balance the number of subjects but to prevent systematic differences between groups.

2. Your friend Carrie took a daily supplement of vitamin C and tells you that she feels a lot better. Her statement to you is best described as what?

• A. an anecdote
• B. theory
• C. interpretation
• D. conclusion

Correct answer: A

Rationale: The correct answer is A, 'an anecdote.' An anecdote is a personal account or experience, not necessarily backed by scientific evidence. In this case, Carrie's statement about feeling better after taking vitamin C is based on her personal experience and does not constitute scientific evidence or a generalizable conclusion. Choice B, 'theory,' would imply a systematic explanation based on scientific evidence, which is not the case here. Choice C, 'interpretation,' typically involves explaining or understanding something based on available information, not a personal account. Choice D, 'conclusion,' would be a general statement derived from specific information or facts, which is not applicable in this context.

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

• A. 10 grams
• B. 15 grams
• C. 20 grams
• D. 25 grams

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.

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

• A. Keeping the infant NPO
• B. Thickening the formula or breast milk with cereal
• C. Placing the infant to sleep on the side
• D. Switching the infant to cow's milk

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. Parents of a 6-month-old child, diagnosed with iron deficiency anemia, ask why it was not diagnosed earlier. What should the nurse say?

• A. Are you sure your child has iron deficiency anemia?
• B. Maternal stores of iron are depleted at about 6 months.
• C. This anemia is caused by blood loss.
• D. The child may not have had it for a long time.

Correct answer: B

Rationale: The correct answer is B: 'Maternal stores of iron are depleted at about 6 months.' Iron deficiency anemia becomes apparent around 6 months of age when the infant's iron stores, primarily received from the mother during pregnancy, are depleted. This timing coincides with the introduction of solid foods, which may lack sufficient iron. Choices A, C, and D are incorrect because they do not address the specific reason why iron deficiency anemia is typically diagnosed around 6 months of age.

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