SOLUTION: The graduate selection committe wants to select the top 10% of applicants. On a standardized test with a mean of 500 and a standard deviation of 100, what woud be the cutoff score

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Question 425318: The graduate selection committe wants to select the top 10% of applicants. On a standardized test with a mean of 500 and a standard deviation of 100, what woud be the cutoff score for selecting the top 10% of applicants, assuming that the standardized test is normally distributed? The answer I got was z-1.282. Is this correct? please help
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
The graduate selection committee wants to select the top 10% of applicants. On a standardized test with a mean of 500 and a standard deviation of 100, what woud be the cutoff score for selecting the top 10% of applicants, assuming that the standardized test is normally distributed? The answer I got was z-1.282. Is this correct?
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You may have posted a typo.
The z-value with a 10% right tail is invNorm(0.90) = 1.2816
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Cheers,
Stan H.