A simple example would be if you roll a die a bunch of times. The parameter here is the number of faces nnn (intuitively, we all know the more faces, the less likely a given face will appear), while the data is just the collected faces you see as you roll the die. Let me tell you right now that for my example to make any sense whatsoever, you have to make the scenario a bit more convoluted. So let’s say you’re playing DnD or some dice-based game, but your game master is rolling the die behind a curtain. So you don’t know how many faces the die has (maybe the game master is lying to you, maybe not), all you know is it’s a die, and the values that are rolled. A frequentist in this situation would tell you the parameter nnn is fixed (although unknown), and the data is just randomly drawn from the uniform distribution X∼U(n)X \sim \mathcal{U}(n)X∼U(n). A Bayesian, on the other hand, would say that the parameter nnn is itself a random variable drawn from some other distribution PPP, with its own uncertainty, and that the data tells you what that distribution truly is.
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。业内人士推荐wps作为进阶阅读
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