document.write( "Question 1167003: The scores of students on an exam are normally distributed with a mean of 384 and a standard deviation of 84.\r
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document.write( "(a) What is the first quartile score for this exam?
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document.write( "Answer:
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document.write( "(b) What is the third quartile score for this exam?
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document.write( "Answer:
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Algebra.Com's Answer #791602 by Boreal(15235) You can put this solution on YOUR website! z=-0.674 for Q1 and +0.674 for Q3 \n" ); document.write( "z=(x-mean)/sd \n" ); document.write( "-0.674=(x-384)/84 \n" ); document.write( "-56.6=x-384 \n" ); document.write( "x=327.4 for Q1 and 440.6 for Q3 \n" ); document.write( " |