Ch. 6 # 5:

I have previously posted this question on Zookal.com, I cannot get a correct answer. The answers I received were wrong, except for c. Please help in answering this correctly.

Let *X* be normally distributed with mean *μ* =
136 and standard deviation *σ* = 34. **[You may find
it useful to reference the** z
table**.]**

**a.** Find *P*(*X* ≤ 100).
**(Round " z" value to 2 decimal places and final
answer to 4 decimal places.)**

*P*(*X* ≤ 100):_______________

**b.** Find *P*(95 *≤ X ≤* 110).
**(Round " z" value to 2 decimal places and final
answer to 4 decimal places.)**

*P*(95 *≤ X ≤* 110):_____________

**c.** Find *x* such that *P*(*X
≤* *x*) = 0.450. **(Round " z" value and
final answer to 3 decimal places.)**

*P*(*X ≤* *x*) =
0.450:_____131.1440______

**d.** Find *x* such that *P*(*X
>* *x*) = 0.850. **(Round " z" value
and final answer to 3 decimal places.)**

*P*(*X >* *x*) =
0.850:________________

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