SOLUTION: The distribution of scores on a standardized aptitude test is approximately normal with a mean of 510 and a standard deviation of 95. What is the minimum score needed to be in the

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Question 1159336: The distribution of scores on a standardized aptitude test is approximately normal with a mean of 510 and a standard deviation of 95. What is the minimum score needed to be in the top 25% on this test? Carry your intermediate computations to at least four decimal places, and round your answer to the nearest integer.
Answer by Boreal(15235) About Me  (Show Source):
You can put this solution on YOUR website!
z=+0.6745 for the 75th percentile
z=(x-mean)/sd
0.6745=(x-510)/95
64.0745=x-510
x=574.0745 for the minimum score or 574 for the 75th percentile or the top 25%