SOLUTION: assume that the random variable X is normally distributed, with mean m = 50 and standard deviation s = 7. Find each indicated percentile for X. The 90th percentile?

Question 1119474: assume that the random variable X is normally distributed, with mean m = 50 and standard deviation s = 7. Find each indicated percentile for X.
The 90th percentile?
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
assume that the random variable X is normally distributed, with mean m = 50 and standard deviation s = 7. Find each indicated percentile for X.
The 90th percentile?
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Find the z-value with a left-tail of 0.9
invNorm(0.9) = 1.2816
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Find the corresponding raw score::
x = 1.2816*7 + 50
x = 58.97
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Cheers,
Stan H.
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