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April 19, 2014

Homework Help: statistik

Posted by mira on Wednesday, November 28, 2012 at 9:19am.

the average starting salary of this yaer's graduates of a large university (LU)is $25000 with a standard deviation of $5000.futhermore,it is known that the starting salaries are normally distributed.
a)what is the probability that a randomly selected LU graduate will have a starting of at least $31000?
b)individuals with starting salaries of less than $12200 receive a low income tax break.what percentage of the graduates will receive the tax break?
C)what are the minimum and the maximum starting salaries of the middle 95% of the LU graduates?
d)if 68 of the recent gradutes have salaries of at least $35600 , how many students graduated this year from this university>

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