document.write( "Question 1044817: Assume the random variable x is normally distributed with mean μ=81 and standard deviation σ=5. Find the indicated probability.\r
\n" ); document.write( "\n" ); document.write( "P(x<72)equals=? (Round to four decimal places as needed.)
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Algebra.Com's Answer #660218 by Boreal(15235)\"\" \"About 
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z=(x-mean)/sd
\n" ); document.write( "=(72-81)/5
\n" ); document.write( "=-1.8
\n" ); document.write( "P z< -1.8 is 0.0359
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