Question

Josh's finger is about 3 ? long.

Answer 1

Answer:

The random walk is simple if Xk = ±1, with P(Xk = 1) = p and P(Xk = −1) = 1−p = q. Imagine a particle performing a random walk on the integer points of the real line, where it in each step moves to one of its neighboring points; see Figure 1. Remark 1. You can also study random walks in higher dimensions.