5.2 Revisiting choice of prior

• Flexibility
• Computational ease: posterior easy to build
• Interpretability

5.2.1 Reminder the Beta-Binomial Model:

1. Prior: \(Beta (\alpha, \beta)\)

2. Data model: \(Y = y \quad for \quad Bin(n, \pi)\)

3. Posterior: \(Beta(\alpha + y, \beta = n - y)\)