Question

Please help inserting the numbers into formula I need help with this exercise practicing for ged test in 10 days im a 61-year-old woman in need of help really need help please help me with exercise five

Answer 1

Given:

`Z=(X-\mu)/(\sigma)`

a)

`\begin{gathered} X=\text{ \$}70 \\ \mu=\text{ \$}100\text{ } \\ \sigma=\text{ \$12} \\ \\ Therefore, \\ Z=(70-100)/(12)=-2.5 \end{gathered}`

Hence,

Therefore,

Therefore,

`P\left(x>Z\right)=0.00042911`

Hence, the answer is 0.00042911.