[Spivak]

* What is the average time it takes to mine a block?

* If I choose a time uniformly what is the expected time it will take to mine that particular block.

The difference between them being that blocks that take a long time occupy more space on the timeline than shorter blocks and are therefore more likely to be chosen.

[gizmo686]

>What is the average time it takes to mine a block?

How do you get this question from CyrusL's original question? CyrusL explicitly specifies that it is 10 minutes per block [0], and that he is uniformly picking a point in time.

[0] Admittedly, he does not specify that it is a Poisson distribution.

[tgb]

Doesn't "If I uniformly randomly pick a point in time..." uniquely specify the latter?

[rajacombinator]

What an appropriate username for that comment...! (Yes, the question is poorly worded.)