SOLUTION: Determine the probability of p(x>108) with a mean of 100 and a standard deviation of 8 ---- z(108) = (108-100)/8 = 1 --- P(x > 108) = P(z

SOLUTION: Determine the probability of p(x>108) with a mean of 100 and a standard deviation of 8 ---- z(108) = (108-100)/8 = 1 --- P(x > 108) = P(z > 1) = 0.1587 I understand everyt

Question 761788: Determine the probability of p(x>108) with a mean of 100 and a standard deviation of 8
----
z(108) = (108-100)/8 = 1
---
P(x > 108) = P(z > 1) = 0.1587
I understand everything very clearly until the problem gets to the answer of 0.1587. I don't understand what techniques or strategy was used to get to this number?
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
Determine the probability of p(x>108) with a mean of 100 and a standard deviation of 8
----
z(108) = (108-100)/8 = 1
---
P(x > 108) = P(z > 1) = 0.1587
I understand everything very clearly until the problem gets to the answer of 0.1587. I don't understand what techniques or strategy was used to get to this number?
===================
You need a z-chart, software, or calculator. There are z-charts and ways
to find P(z > 1) online.
------
I use a TI-84 calculator to get normalcdf(1,100) = 0.1587
=================
Cheers,
Stan H.
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