To gain more experience with probability theory, to gain experience with convolution, and to practice working with recurrence relations.
Show all work. i.e., justify your answers.
Probability Theory:
Let's define a simple experiment as follows: permute the numbers $(1,2,3,4)$. Each sample (outcome) is such a permutation. Now define a random variable $X$which assigns to each sample the number of elements that are not in their correct (sorted) position. For example, for the following samples, $X$ assigns the indicated values:
Also, assume a uniform distribution over samples. (Each question scored individually.)
Convolution:
Convolve these two sequences (signals) A and B to produce a new third sequence (signal) C:
Recurrence Relations:
Suppose an algorithm has running time described by the following recurrence relation: $T(n) = 4 T(n/3) + n^3$. Use the theory of recurrence relations to solve this recurrence relation.