In terms of expected value, a 30% chance at a three-pointer is the same as a 45% chance at a two. In crunch time, though, such as "up 1 with possession, 40 seconds left," the 45% two-pointer is better because it has the same expectation at a lower variance. In fact, many would be willing to sacrifice some amount of expectation to lower variance. In the real world, it's called insurance.

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