SOLUTION: The distribution of scores on a standardized aptitude test is approximately normal with a mean of 520 and a standard deviation of 100 . What is the minimum score needed to be in th

Question 1159210: The distribution of scores on a standardized aptitude test is approximately normal with a mean of 520 and a standard deviation of 100 . What is the minimum score needed to be in the top 15% 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) (Show Source): You can put this solution on YOUR website!
the z-score for the 85th percentile is 1.0364
z=(x-mean)/sd
1.0364=(x-520)/100
103.64=x-520
x=623.64 or 624
RELATED QUESTIONS
The distribution of scores on a standardized aptitude test is approximately normal with a (answered by Boreal)

The distribution of scores on a standardized aptitude test is approximately normal with a (answered by VFBundy)

I am stuck :( The distribution of scores on a standardized aptitude test is... (answered by ad_alta)

The distribution of scores on a standardized aptitude test is approximately normal with a (answered by Boreal)

ACT scores for each section are standardized so scores follow an approximately normal... (answered by ewatrrr)

The distribution of certain test scores is a nonstandard normal distribution with a mean... (answered by stanbon)

The distribution of scores on a standardized test is approximately Normal with standard... (answered by Boreal)

Scores on a test have a mean of 73 and 10 percent of the scores are above 87. The scores... (answered by oscargut)

Scores on a test have a mean of 73 and Q3 is 83. The scores have a distribution that is... (answered by Theo)