document.write( "Question 1175051: Suppose that total carbohydrate intake in 12-14 years old males is normally distributed with mean 124 g/1000 cal and standard deviation of 20 g / 1000cal.
\n" ); document.write( "a. What percent of boys in this age range have carbohydrate intake above 140 g/ 1000 cal?
\n" ); document.write( "b. What is the probability that a sample of 35 boys have a mean carbohydrate intake of greater than 120 g /100 cal? \n" ); document.write( "

Algebra.Com's Answer #800608 by ewatrrr(24785) $\"\"$ $\"About$

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document.write( "Hi \r\n" );
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document.write( "Normal Distribution:    μ = 124  and   σ = 20  \r\n" );
document.write( "Continuous curve..\r\n" );
document.write( "a) P(x > 140) = 1- P(x ≤ 140) =  1-0.7881 = .2119\r\n" );
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document.write( "b)P(x > 120) = 1-P(x ≤ 120) = 1 - .4207 = .5793\r\n" );
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document.write( "c) z =blue (x̄ - mu)/sigma/sqrt(n) = (120-124)/20/√35 =  -1.1832 \r\n" );
document.write( " invNorm(-1.832) = .1184\r\n" );
document.write( " P(z >-1.1834) = 1 - .1184 = .9916\r\n" );
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document.write( "Wish You the Best in your Studies.\r\n" );
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