document.write( "Question 824127: The ages of all kindergarten children are normally distributed with
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document.write( "mean 4 years and standard deviation 6 months.
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document.write( "What is the probability that a randomly chosen kindergarten child
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document.write( "will be older than 5 years, 4 months old?
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document.write( "Use Table A-2 and write your answer as a decimal with 4 decimal places. \n" );
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Algebra.Com's Answer #496112 by stanbon(75887)![]() ![]() ![]() You can put this solution on YOUR website! The ages of all kindergarten children are normally distributed with \n" ); document.write( "mean 4 years and standard deviation 6 months. \n" ); document.write( "---------------------------------------- \n" ); document.write( "What is the probability that a randomly chosen kindergarten child \n" ); document.write( "will be older than 5 years, 4 months old? \n" ); document.write( "----- \n" ); document.write( "Note: 5 yrs 4 months = 5 1/3 = 16/3 yrs \n" ); document.write( "------- \n" ); document.write( "z(16/3) = [(16/3)-(12/3))/(18/3) = (4/3)/(18/3) = 2/9 \n" ); document.write( "----------- \n" ); document.write( "P(x > 5yrs 4 mths) = P(z > 2/9) = normalcdf[(2/9),100] = 0.4121 \n" ); document.write( "===================== \n" ); document.write( "Cheers, \n" ); document.write( "Stan H. \n" ); document.write( "===================== \n" ); document.write( " \n" ); document.write( " |