SOLUTION: Assume that SAT scores are normally distributed with mean = 1518 and standard deviation = 325. a. If one SAT is randomly selected, find the probability that it is greater than 160

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Question 665509: Assume that SAT scores are normally distributed with mean = 1518 and standard deviation = 325.
a. If one SAT is randomly selected, find the probability that it is greater than 1600.
b. If 64 SAT scores are randomly selected, find the probability that they have a mean greater than 1600.

Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 
Hi,
you did not say what method You use to translate z-value to P-value
μ = 1518 , σ = 325
one SAT is randomly selected:
P(x>1600) = 1 - P(z+=+%281600-1518%29%2F325)
64 SAT scores are randomly selected:
P( x >16000) = 1 - P( z+=+%281600-1518%29%2F%28325%2F8%29 )