# Question

Imagine that you are trapped in a circular room with three doors symmetrically placed around the perimeter. You are told by a mysterious voice that one door leads to the outside after a 2- h trip through a maze. However, the other two doors lead to mazes that terminate back in the room after a 2- h trip at which time you are unable to tell through which door you exited or entered. What is the average time for escape to the outside? Can you guess the answer ahead of time? If not, can you provide a physical explanation for the answer you calculate?

## Answer to relevant Questions

Suppose X is a Gaussian random variable with a mean of µ and a variance of σ2 ( i. e., X ~ N( µ, σ2)). Find an expression for E [|X|]. Prove Jensen’s inequality, which states that for any convex function g (x) and any random variable X, E [ g( X)] ≥ g ( E [ X]). Suppose X is a random variable whose n th moment is gn, n = 1, 2, 3… In terms of the gn, find an expression for E [eX]. A random variable X has a uniform distribution over the interval (– a / 2, a / 2) for some positive constant a. (a) Find the coefficient of skewness for X; (b) Find the coefficient of kurtosis for X; (c) Compare the ...Consider a Gaussian random variable, X, with mean µ and variance σ2. (a) Find E [X|X > u + σ] (b) Find E [X|| X –u| < σ]Post your question

0