• Collecting data that excludes a certain demographic or isn’t compiled by appropriate randomization
• Relying on preexisting beliefs or trends when collecting data ✅
  
• Reinforcing social stereotypes that can be inaccurate or even harmful to a specific group
• Collecting data from a source that’s systematically different from its actual variable of interest
  

Explanation:
Confirmation bias occurs when someone relies on preexisting beliefs or trends when collecting data, leading to skewed or inaccurate results.