SOLUTION: find the x-value having the normal distribution N(1000,250) that has 10% of the area under that normal curve lying to its right.

Question 185912: find the x-value having the normal distribution N(1000,250) that has 10% of the area under that normal curve lying to its right.
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
find the x-value having the normal distribution N(1000,250) that has 10% of the area under that normal curve lying to its right.
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1st: Find the z-value that has 10% to the right.
Using a Ti-83 I get InvNorm(0.9) = 1.2816
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2nd: Find the corresponding x-value using z = (x-u)/s
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1.2816 = (x-1000)/250
x-1000 = 250*1.2816
x-1000 = 320.3879
x = 1320.3879
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Cheers,
Stan H.
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