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September 17, 2014

Homework Help: probability and statistics

Posted by darrell on Friday, January 6, 2012 at 2:59pm.

the population of sat scores forms a normal distribution with a mean of u=500 and a standard deviation of o=100. if the average sat score is calculated for a sample of n=25 students.
a. what is the probability that the sample mean will be greater than m=510? in symbols, what is p(m>510)?
b. what is the probability that the sample mean will be greater than m=520? in symbols, what is p(m>520)?
c. what is the probability that the sample mean will between m=510 and m=520? in symbols, what is p(510<m<520)?

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