document.write( "Question 437352: Suppose that the replacement times for washing machines are normally distributed with a mean of 8.7 years and a standard deviation of 1.6 years. Find the replacement time that separated the top 18% of washing machines from the bottome 82% \n" ); document.write( "

Algebra.Com's Answer #302580 by ewatrrr(24785) $\"\"$ $\"About$

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document.write( "Hi
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document.write( "Suppose that the replacement times for washing machines are normally distributed 
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document.write( "with a mean of 8.7 years and a standard deviation of 1.6 years
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document.write( "Find the replacement time that separated the top 18% of washing machines 
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document.write( "from the bottome 82%   P (x < 82%)  then z = .9154    | NORMSINV(0.82) 
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document.write( "*Note: 
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document.write( "   .9154(1.6) + 8.7 = x
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document.write( "           10.1646 = x
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document.write( "   \n" );
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