題組內容

2. Let 6167d98fe262a.jpg, for i = 1, 2,3,... , be independent and identically distributed (i.i.d.) random variables. The expectation and variance of each 6167d996445a5.jpg are μ and σ2 , respectively. Please answer the following questions:

(1). (5%) What is the probability distribution of 6167d9d09dad5.jpg?