1. Can pX(n)=g(n) be the probability mass function of a discrete random variable X that takes values in Z? If not, why, and if so, solve the E[X] and Var(X).

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g(x) =
3
4+1
if n < x < n + 1
given this function
for all nonnegative integers n=0,1,2,3,... and g(x)=0 otherwise. (Hint: I strongly suggest that you
graph this function.)
1. Can px(n)=g(n) be the probability mass function of a discrete random variable X that takes
values in Z? If not, why, and if so, solve the E[X] and Var(X).
2. Can pY(y)=g(y) be the probability density function of a continuous random variable Y? If not,
explain why, and if so, compute E[Y] and Var(Y).
Transcribed Image Text:g(x) = 3 4+1 if n < x < n + 1 given this function for all nonnegative integers n=0,1,2,3,... and g(x)=0 otherwise. (Hint: I strongly suggest that you graph this function.) 1. Can px(n)=g(n) be the probability mass function of a discrete random variable X that takes values in Z? If not, why, and if so, solve the E[X] and Var(X). 2. Can pY(y)=g(y) be the probability density function of a continuous random variable Y? If not, explain why, and if so, compute E[Y] and Var(Y).
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