You're designing an A/B test to evaluate the impact of showing content from non-friends in users' feeds. How would you test this with proper randomization?

Focus on outlining a clear A/B testing framework that includes defining your control and experimental groups. Specify how you would randomly assign users to each group to ensure unbiased results, considering factors like user demographics and behavior patterns. Discuss the metrics you would track to measure the impact of non-friend content, such as engagement rates, time spent on the platform, and user satisfaction. Finally, address how you would ensure the test runs for an appropriate duration to gather statistically significant data, and how you would analyze the results to draw actionable insights.