You Decide to Follow the Development of the Human Gut

question 163

Multiple Choice

You decide to follow the development of the human gut microbiota over time by sampling the solid waste of infants from birth to 24 weeks old. Which of the following setups minimizes the sources of variation in your experiment?

• A)Sample three infants from three different families that are 1 day old, three infants that are 1 week old, three infants that are 2 weeks old, and so on.
• B)Sample three infants from three different families the day they are born, when they are 1 week old, 2 weeks old, and so on.
• C)Sample identical triplets from a single family when they are 1 day old, 1 week old, 2 weeks old, and so on.
• D)All of the experimental designs described here have the same level of variation.

---

Definitions:

CSR Outreach Program

Initiatives undertaken by a company to demonstrate its commitment to social responsibility, typically including community service, environmental stewardship, and engagement in local issues.

Affordable Care Act

A U.S. healthcare reform law enacted in 2010 that expanded insurance coverage and healthcare access while trying to reduce healthcare costs.

Gallup Survey

A research method employed by Gallup, Inc., involving systematic polling and analysis to measure public opinion and behavior on various topics.

First Ladies Health Initiative

A program or campaign initiated by the spouse of the sitting U.S. president focusing on health and wellness issues.