SOLUTION: Assume that average annual salary for a worker in th u.s. is $39,000 and the annual annual salary for americans are normally distributed with a standard deviation equal to $7,000 f

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Question 617133: Assume that average annual salary for a worker in th u.s. is $39,000 and the annual annual salary for americans are normally distributed with a standard deviation equal to $7,000 find the following A) what percentage of americans earn below $25,000 B) what percentage of americans earn above $44,000
Answer by ewatrrr(24785)   (Show Source): You can put this solution on YOUR website!
 

Hi, 

Assume that average annual salary for a worker in th u.s. is $39,000 and the

 annual annual salary for americans are normally distributed with a SD = $7,000

 P(X<25) = P(z < -2)  NORMSDIST (-2) = .0228,   2.28%

P(X >44) = 1- P(z < (44,000 - 39,000)/7000) = 1 - P(z< .7143) = 1- .7325 = .2375,  %  

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