An L.

asked • 11/12/13

Find the value of x so that the area under the normal curve is between...

EDIT: μ = 200 and σ = 25.
 
1. Find the value of x so that the area under the normal curve between μ and x is .4525 and the value of x is less than μ.
 
2. Find the value of x so that the area under the normal curve between μ and x is approximately .4800 and the value of x is greater than μ.

3 Answers By Expert Tutors

By:

An L.

I know this isn't worth much but in my book, the answer for number 1 is 158.25.
 
Also, the equation is:
 
x = μ + zσ
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11/13/13

John L.

tutor
Hi An,
 
Since you didn't provide a value for μ or σ we can't really come up with a value for x, only a z score corresponding to the area you provided. The values for μ and σ should have been provided by your book for the question (or they at least should have given you the information necessary to compute μ and σ).
 
 
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11/13/13

An L.

Oh, excuse my mistake then, 
 
μ = 200
and σ = 25.
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11/13/13

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