document.write( "Question 898648: A statistical analysis of telephone calls made by a company indicates that the length of these calls is normally distributed , with mean 260 seconds and SD 40 seconds
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Algebra.Com's Answer #544938 by ewatrrr(24785) $\"\"$ $\"About$

You can put this solution on YOUR website!

 
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document.write( "Hi
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document.write( "z = (190-260)/40 = -70/40 = -7/4 = -1.75
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document.write( "z = (140-260)/40 = -120/40 = -3
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document.write( "1)P(z < -1.75) = .0401   0r 4.01%
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document.write( "2) P(x < -1.75) - P(x<-3) = .0401 - .0013 = .0388  Or 3.88%
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document.write( "repost for using Calculator Work Up \n" );
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