Suppose X Is a Random Variable for Which a Poisson $\lambda = 3$

Essay

Suppose x is a random variable for which a Poisson probability distribution
with $\lambda = 3$ 3 provides a good approximation.
a. Graph $p ( x )$ for $x = 0,1,2,3,4,5,6$ .
b. Find $\mu$ and $\sigma$ for $x$ .
c. What is the probability that $x$ will fall in the interval $\mu \pm \sigma$ ?