A manager is considering placing an ad campaign on an emerging social media platform (e.g., Snap). To understand the demographics of usage for this platform, the manager takes a random sample of potential users and asks them if they participate in this social media platform. The results are shown below: Part of Social Media Not part of social media Platform platform Age = 30 28 28 What is the "pooled" p-bar? (Hint: Please read the column headers carefully before launching into your test). O 0.628 O 0.737 O 0.55 O 0.445