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October 25, 2014

Homework Help: statistics

Posted by T on Sunday, February 27, 2011 at 4:06pm.

The population of SAT scores forms a normal distribution with a mean of µ =500 and a standard deviation of σ =100. If the average SAT score 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 >520?
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 be between M =510 and M = 520? In symbols, what is p (510 < M < 520?

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