Question

Short steps pleaseFind the mean and variance of the binomial experiment in which n 5 and p 0.7. a. Mean b. Variance

Answer 1

Given

n= 5

p = 0.7

Find:

a. mean

b. variance

sol:

Mean d

`\begin{gathered} mean\text{ =n}*\text{p} \\ \\ \text{ = 5}*\text{0.7} \\ \\ \text{ =3.5} \end{gathered}`
`\begin{gathered} variance=np(1-p) \\ \\ =\text{ }5*0.7(1-0.7) \\ \\ =3.5(0.3) \\ \\ =1.05 \\ \\ \end{gathered}`